What's the difference between an initial value problem and a boundary value problem?












10












$begingroup$


I don't really see the difference, because in both case we need to determine y and the values of the constants. The only difference is that we give the value of y and y' in the former and the value of either 2 y or 2 y' in the latter.



I solve both problems the same way. I don't really understand the theory, I guess.










share|cite|improve this question









$endgroup$








  • 1




    $begingroup$
    You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
    $endgroup$
    – user147263
    Jul 27 '14 at 4:46
















10












$begingroup$


I don't really see the difference, because in both case we need to determine y and the values of the constants. The only difference is that we give the value of y and y' in the former and the value of either 2 y or 2 y' in the latter.



I solve both problems the same way. I don't really understand the theory, I guess.










share|cite|improve this question









$endgroup$








  • 1




    $begingroup$
    You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
    $endgroup$
    – user147263
    Jul 27 '14 at 4:46














10












10








10


5



$begingroup$


I don't really see the difference, because in both case we need to determine y and the values of the constants. The only difference is that we give the value of y and y' in the former and the value of either 2 y or 2 y' in the latter.



I solve both problems the same way. I don't really understand the theory, I guess.










share|cite|improve this question









$endgroup$




I don't really see the difference, because in both case we need to determine y and the values of the constants. The only difference is that we give the value of y and y' in the former and the value of either 2 y or 2 y' in the latter.



I solve both problems the same way. I don't really understand the theory, I guess.







ordinary-differential-equations






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share|cite|improve this question










asked May 18 '13 at 2:54









Gladstone AsderGladstone Asder

5313921




5313921








  • 1




    $begingroup$
    You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
    $endgroup$
    – user147263
    Jul 27 '14 at 4:46














  • 1




    $begingroup$
    You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
    $endgroup$
    – user147263
    Jul 27 '14 at 4:46








1




1




$begingroup$
You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
$endgroup$
– user147263
Jul 27 '14 at 4:46




$begingroup$
You'll find some concrete illustration of how IVP and BVP behave differently in IVP vs. BVP
$endgroup$
– user147263
Jul 27 '14 at 4:46










8 Answers
8






active

oldest

votes


















10












$begingroup$

An initial value problem is how to aim my gun. A boundary value problem is how to aim my gun so that the bullet hits the target.



Qualitatively the methods of solution are sometimes different, because Taylor series approximate a function at a single point, i.e. at 0.






share|cite|improve this answer









$endgroup$





















    10












    $begingroup$

    For a simple example (second order ODE), an initial value problem would say $y(a)=p$, $y'(a)=q$.



    A boundary value problem would specify $y(a)=p$, $y(b)=q$.






    share|cite|improve this answer









    $endgroup$





















      3












      $begingroup$

      Initial Value Problems:



      In initial value problems, we are given the value of function $y(x)$ and its derivative $y'(x)$ at the same point ( initial point ) sy at $x = 0$
      i.e $y(0)= xi1$ and $y'(0)= x_2$.



      Boundary Value Problems:



      In boundary value problem, we are given the value of function $y(x)$ at two different points, i.e $y(a)= x_1$ and $y(b)= x_2$.






      share|cite|improve this answer











      $endgroup$





















        2












        $begingroup$

        Initial Value Problems:



        Initial value problem does not require to specify the value at boundaries, instead it needs the value during initial condition. This usually apply for dynamic system that is changing over time as in Physics. An example, to solve a particle position under differential equation, we need the initial position and also initial velocity. Without these initial values, we cannot determine the final position from the equation.



        Boundary Value Problems:
        In contrast, boundary value problems not necessarily used for dynamic system. Instead, it is very useful for a system that has space boundary. An example would be shape from shading problem in computer vision. To determine surface gradient from the PDE, one should impose boundary values on the region of interest.






        share|cite|improve this answer









        $endgroup$





















          1












          $begingroup$

          Initial value problem will be given initial conditions. But the boundary value problem contains boundary conditions like y(x1) and y(x2).






          share|cite|improve this answer









          $endgroup$





















            0












            $begingroup$

            In initial value problem values are given according to initial stages such as when there is initial stage means at zero time the Velocity and Acceleration have zero values similarly in initial value problems the points given according to zero value of that function and its derivative.
            Where in boundary value problem the end points are non zero element means at t>0 the conditions given will called the boundary value problems.
            For Example.



            G(0)=0 , G'(0)=0 I,C's (Initial conditions)



            G(2)=4 , G'(1)=3 B,C's (Boundary conditions)






            share|cite|improve this answer









            $endgroup$





















              -1












              $begingroup$

              Initial valye problems are those,which are related to the initial conditions of a question and no limit is used.
              While boundry vaue problems are those in which limit is used i.e an interval is given !






              share|cite|improve this answer









              $endgroup$





















                -1












                $begingroup$

                In initial value problem we always want to determine the value of f(x)and f'(x) at initial point it may be 0 or something else but initial like f(1)=3 and f'(1)=2 then we can determine the constant.But in boundry value problem the condition will in form of a interval i.e.f(0)=3,f(2)=5






                share|cite|improve this answer









                $endgroup$













                • $begingroup$
                  Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                  $endgroup$
                  – José Carlos Santos
                  Nov 25 '17 at 14:36











                Your Answer





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                8 Answers
                8






                active

                oldest

                votes








                8 Answers
                8






                active

                oldest

                votes









                active

                oldest

                votes






                active

                oldest

                votes









                10












                $begingroup$

                An initial value problem is how to aim my gun. A boundary value problem is how to aim my gun so that the bullet hits the target.



                Qualitatively the methods of solution are sometimes different, because Taylor series approximate a function at a single point, i.e. at 0.






                share|cite|improve this answer









                $endgroup$


















                  10












                  $begingroup$

                  An initial value problem is how to aim my gun. A boundary value problem is how to aim my gun so that the bullet hits the target.



                  Qualitatively the methods of solution are sometimes different, because Taylor series approximate a function at a single point, i.e. at 0.






                  share|cite|improve this answer









                  $endgroup$
















                    10












                    10








                    10





                    $begingroup$

                    An initial value problem is how to aim my gun. A boundary value problem is how to aim my gun so that the bullet hits the target.



                    Qualitatively the methods of solution are sometimes different, because Taylor series approximate a function at a single point, i.e. at 0.






                    share|cite|improve this answer









                    $endgroup$



                    An initial value problem is how to aim my gun. A boundary value problem is how to aim my gun so that the bullet hits the target.



                    Qualitatively the methods of solution are sometimes different, because Taylor series approximate a function at a single point, i.e. at 0.







                    share|cite|improve this answer












                    share|cite|improve this answer



                    share|cite|improve this answer










                    answered May 18 '13 at 3:12









                    vadim123vadim123

                    76.1k897190




                    76.1k897190























                        10












                        $begingroup$

                        For a simple example (second order ODE), an initial value problem would say $y(a)=p$, $y'(a)=q$.



                        A boundary value problem would specify $y(a)=p$, $y(b)=q$.






                        share|cite|improve this answer









                        $endgroup$


















                          10












                          $begingroup$

                          For a simple example (second order ODE), an initial value problem would say $y(a)=p$, $y'(a)=q$.



                          A boundary value problem would specify $y(a)=p$, $y(b)=q$.






                          share|cite|improve this answer









                          $endgroup$
















                            10












                            10








                            10





                            $begingroup$

                            For a simple example (second order ODE), an initial value problem would say $y(a)=p$, $y'(a)=q$.



                            A boundary value problem would specify $y(a)=p$, $y(b)=q$.






                            share|cite|improve this answer









                            $endgroup$



                            For a simple example (second order ODE), an initial value problem would say $y(a)=p$, $y'(a)=q$.



                            A boundary value problem would specify $y(a)=p$, $y(b)=q$.







                            share|cite|improve this answer












                            share|cite|improve this answer



                            share|cite|improve this answer










                            answered May 18 '13 at 3:04









                            André NicolasAndré Nicolas

                            453k36427813




                            453k36427813























                                3












                                $begingroup$

                                Initial Value Problems:



                                In initial value problems, we are given the value of function $y(x)$ and its derivative $y'(x)$ at the same point ( initial point ) sy at $x = 0$
                                i.e $y(0)= xi1$ and $y'(0)= x_2$.



                                Boundary Value Problems:



                                In boundary value problem, we are given the value of function $y(x)$ at two different points, i.e $y(a)= x_1$ and $y(b)= x_2$.






                                share|cite|improve this answer











                                $endgroup$


















                                  3












                                  $begingroup$

                                  Initial Value Problems:



                                  In initial value problems, we are given the value of function $y(x)$ and its derivative $y'(x)$ at the same point ( initial point ) sy at $x = 0$
                                  i.e $y(0)= xi1$ and $y'(0)= x_2$.



                                  Boundary Value Problems:



                                  In boundary value problem, we are given the value of function $y(x)$ at two different points, i.e $y(a)= x_1$ and $y(b)= x_2$.






                                  share|cite|improve this answer











                                  $endgroup$
















                                    3












                                    3








                                    3





                                    $begingroup$

                                    Initial Value Problems:



                                    In initial value problems, we are given the value of function $y(x)$ and its derivative $y'(x)$ at the same point ( initial point ) sy at $x = 0$
                                    i.e $y(0)= xi1$ and $y'(0)= x_2$.



                                    Boundary Value Problems:



                                    In boundary value problem, we are given the value of function $y(x)$ at two different points, i.e $y(a)= x_1$ and $y(b)= x_2$.






                                    share|cite|improve this answer











                                    $endgroup$



                                    Initial Value Problems:



                                    In initial value problems, we are given the value of function $y(x)$ and its derivative $y'(x)$ at the same point ( initial point ) sy at $x = 0$
                                    i.e $y(0)= xi1$ and $y'(0)= x_2$.



                                    Boundary Value Problems:



                                    In boundary value problem, we are given the value of function $y(x)$ at two different points, i.e $y(a)= x_1$ and $y(b)= x_2$.







                                    share|cite|improve this answer














                                    share|cite|improve this answer



                                    share|cite|improve this answer








                                    edited Oct 4 '15 at 8:12









                                    Scientifica

                                    6,78641335




                                    6,78641335










                                    answered Oct 4 '15 at 7:53









                                    Muhammad TariqMuhammad Tariq

                                    311




                                    311























                                        2












                                        $begingroup$

                                        Initial Value Problems:



                                        Initial value problem does not require to specify the value at boundaries, instead it needs the value during initial condition. This usually apply for dynamic system that is changing over time as in Physics. An example, to solve a particle position under differential equation, we need the initial position and also initial velocity. Without these initial values, we cannot determine the final position from the equation.



                                        Boundary Value Problems:
                                        In contrast, boundary value problems not necessarily used for dynamic system. Instead, it is very useful for a system that has space boundary. An example would be shape from shading problem in computer vision. To determine surface gradient from the PDE, one should impose boundary values on the region of interest.






                                        share|cite|improve this answer









                                        $endgroup$


















                                          2












                                          $begingroup$

                                          Initial Value Problems:



                                          Initial value problem does not require to specify the value at boundaries, instead it needs the value during initial condition. This usually apply for dynamic system that is changing over time as in Physics. An example, to solve a particle position under differential equation, we need the initial position and also initial velocity. Without these initial values, we cannot determine the final position from the equation.



                                          Boundary Value Problems:
                                          In contrast, boundary value problems not necessarily used for dynamic system. Instead, it is very useful for a system that has space boundary. An example would be shape from shading problem in computer vision. To determine surface gradient from the PDE, one should impose boundary values on the region of interest.






                                          share|cite|improve this answer









                                          $endgroup$
















                                            2












                                            2








                                            2





                                            $begingroup$

                                            Initial Value Problems:



                                            Initial value problem does not require to specify the value at boundaries, instead it needs the value during initial condition. This usually apply for dynamic system that is changing over time as in Physics. An example, to solve a particle position under differential equation, we need the initial position and also initial velocity. Without these initial values, we cannot determine the final position from the equation.



                                            Boundary Value Problems:
                                            In contrast, boundary value problems not necessarily used for dynamic system. Instead, it is very useful for a system that has space boundary. An example would be shape from shading problem in computer vision. To determine surface gradient from the PDE, one should impose boundary values on the region of interest.






                                            share|cite|improve this answer









                                            $endgroup$



                                            Initial Value Problems:



                                            Initial value problem does not require to specify the value at boundaries, instead it needs the value during initial condition. This usually apply for dynamic system that is changing over time as in Physics. An example, to solve a particle position under differential equation, we need the initial position and also initial velocity. Without these initial values, we cannot determine the final position from the equation.



                                            Boundary Value Problems:
                                            In contrast, boundary value problems not necessarily used for dynamic system. Instead, it is very useful for a system that has space boundary. An example would be shape from shading problem in computer vision. To determine surface gradient from the PDE, one should impose boundary values on the region of interest.







                                            share|cite|improve this answer












                                            share|cite|improve this answer



                                            share|cite|improve this answer










                                            answered Oct 5 '15 at 7:25









                                            habibhabib

                                            211




                                            211























                                                1












                                                $begingroup$

                                                Initial value problem will be given initial conditions. But the boundary value problem contains boundary conditions like y(x1) and y(x2).






                                                share|cite|improve this answer









                                                $endgroup$


















                                                  1












                                                  $begingroup$

                                                  Initial value problem will be given initial conditions. But the boundary value problem contains boundary conditions like y(x1) and y(x2).






                                                  share|cite|improve this answer









                                                  $endgroup$
















                                                    1












                                                    1








                                                    1





                                                    $begingroup$

                                                    Initial value problem will be given initial conditions. But the boundary value problem contains boundary conditions like y(x1) and y(x2).






                                                    share|cite|improve this answer









                                                    $endgroup$



                                                    Initial value problem will be given initial conditions. But the boundary value problem contains boundary conditions like y(x1) and y(x2).







                                                    share|cite|improve this answer












                                                    share|cite|improve this answer



                                                    share|cite|improve this answer










                                                    answered May 28 '16 at 12:42









                                                    K S RupaK S Rupa

                                                    111




                                                    111























                                                        0












                                                        $begingroup$

                                                        In initial value problem values are given according to initial stages such as when there is initial stage means at zero time the Velocity and Acceleration have zero values similarly in initial value problems the points given according to zero value of that function and its derivative.
                                                        Where in boundary value problem the end points are non zero element means at t>0 the conditions given will called the boundary value problems.
                                                        For Example.



                                                        G(0)=0 , G'(0)=0 I,C's (Initial conditions)



                                                        G(2)=4 , G'(1)=3 B,C's (Boundary conditions)






                                                        share|cite|improve this answer









                                                        $endgroup$


















                                                          0












                                                          $begingroup$

                                                          In initial value problem values are given according to initial stages such as when there is initial stage means at zero time the Velocity and Acceleration have zero values similarly in initial value problems the points given according to zero value of that function and its derivative.
                                                          Where in boundary value problem the end points are non zero element means at t>0 the conditions given will called the boundary value problems.
                                                          For Example.



                                                          G(0)=0 , G'(0)=0 I,C's (Initial conditions)



                                                          G(2)=4 , G'(1)=3 B,C's (Boundary conditions)






                                                          share|cite|improve this answer









                                                          $endgroup$
















                                                            0












                                                            0








                                                            0





                                                            $begingroup$

                                                            In initial value problem values are given according to initial stages such as when there is initial stage means at zero time the Velocity and Acceleration have zero values similarly in initial value problems the points given according to zero value of that function and its derivative.
                                                            Where in boundary value problem the end points are non zero element means at t>0 the conditions given will called the boundary value problems.
                                                            For Example.



                                                            G(0)=0 , G'(0)=0 I,C's (Initial conditions)



                                                            G(2)=4 , G'(1)=3 B,C's (Boundary conditions)






                                                            share|cite|improve this answer









                                                            $endgroup$



                                                            In initial value problem values are given according to initial stages such as when there is initial stage means at zero time the Velocity and Acceleration have zero values similarly in initial value problems the points given according to zero value of that function and its derivative.
                                                            Where in boundary value problem the end points are non zero element means at t>0 the conditions given will called the boundary value problems.
                                                            For Example.



                                                            G(0)=0 , G'(0)=0 I,C's (Initial conditions)



                                                            G(2)=4 , G'(1)=3 B,C's (Boundary conditions)







                                                            share|cite|improve this answer












                                                            share|cite|improve this answer



                                                            share|cite|improve this answer










                                                            answered Apr 14 '17 at 19:18









                                                            Mirza Ali RazaMirza Ali Raza

                                                            1




                                                            1























                                                                -1












                                                                $begingroup$

                                                                Initial valye problems are those,which are related to the initial conditions of a question and no limit is used.
                                                                While boundry vaue problems are those in which limit is used i.e an interval is given !






                                                                share|cite|improve this answer









                                                                $endgroup$


















                                                                  -1












                                                                  $begingroup$

                                                                  Initial valye problems are those,which are related to the initial conditions of a question and no limit is used.
                                                                  While boundry vaue problems are those in which limit is used i.e an interval is given !






                                                                  share|cite|improve this answer









                                                                  $endgroup$
















                                                                    -1












                                                                    -1








                                                                    -1





                                                                    $begingroup$

                                                                    Initial valye problems are those,which are related to the initial conditions of a question and no limit is used.
                                                                    While boundry vaue problems are those in which limit is used i.e an interval is given !






                                                                    share|cite|improve this answer









                                                                    $endgroup$



                                                                    Initial valye problems are those,which are related to the initial conditions of a question and no limit is used.
                                                                    While boundry vaue problems are those in which limit is used i.e an interval is given !







                                                                    share|cite|improve this answer












                                                                    share|cite|improve this answer



                                                                    share|cite|improve this answer










                                                                    answered Feb 28 '15 at 16:41









                                                                    Mohammad shehryarMohammad shehryar

                                                                    1




                                                                    1























                                                                        -1












                                                                        $begingroup$

                                                                        In initial value problem we always want to determine the value of f(x)and f'(x) at initial point it may be 0 or something else but initial like f(1)=3 and f'(1)=2 then we can determine the constant.But in boundry value problem the condition will in form of a interval i.e.f(0)=3,f(2)=5






                                                                        share|cite|improve this answer









                                                                        $endgroup$













                                                                        • $begingroup$
                                                                          Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                          $endgroup$
                                                                          – José Carlos Santos
                                                                          Nov 25 '17 at 14:36
















                                                                        -1












                                                                        $begingroup$

                                                                        In initial value problem we always want to determine the value of f(x)and f'(x) at initial point it may be 0 or something else but initial like f(1)=3 and f'(1)=2 then we can determine the constant.But in boundry value problem the condition will in form of a interval i.e.f(0)=3,f(2)=5






                                                                        share|cite|improve this answer









                                                                        $endgroup$













                                                                        • $begingroup$
                                                                          Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                          $endgroup$
                                                                          – José Carlos Santos
                                                                          Nov 25 '17 at 14:36














                                                                        -1












                                                                        -1








                                                                        -1





                                                                        $begingroup$

                                                                        In initial value problem we always want to determine the value of f(x)and f'(x) at initial point it may be 0 or something else but initial like f(1)=3 and f'(1)=2 then we can determine the constant.But in boundry value problem the condition will in form of a interval i.e.f(0)=3,f(2)=5






                                                                        share|cite|improve this answer









                                                                        $endgroup$



                                                                        In initial value problem we always want to determine the value of f(x)and f'(x) at initial point it may be 0 or something else but initial like f(1)=3 and f'(1)=2 then we can determine the constant.But in boundry value problem the condition will in form of a interval i.e.f(0)=3,f(2)=5







                                                                        share|cite|improve this answer












                                                                        share|cite|improve this answer



                                                                        share|cite|improve this answer










                                                                        answered Nov 25 '17 at 14:32









                                                                        vasant kumar mishravasant kumar mishra

                                                                        1




                                                                        1












                                                                        • $begingroup$
                                                                          Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                          $endgroup$
                                                                          – José Carlos Santos
                                                                          Nov 25 '17 at 14:36


















                                                                        • $begingroup$
                                                                          Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                          $endgroup$
                                                                          – José Carlos Santos
                                                                          Nov 25 '17 at 14:36
















                                                                        $begingroup$
                                                                        Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                        $endgroup$
                                                                        – José Carlos Santos
                                                                        Nov 25 '17 at 14:36




                                                                        $begingroup$
                                                                        Welcome to MSE. What's the point of providing an answer to a question posted years ago and which has an accepted answer?
                                                                        $endgroup$
                                                                        – José Carlos Santos
                                                                        Nov 25 '17 at 14:36


















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