Clarification on boundary condition and solution












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I am attaching a photo of solved example for finite difference method. I have not understood the boundary condition at line two....should it not be at x=5 and y=4?(marked in pencil)



Also in the third line from bottom, shouldn’t it be



$a_0u_3 +a_1u_7 + a_2u_{10} + a_3u_2 + a_4u_6 = h^2G(x) = 4times48$.



Is there a mistake in my understanding or are they printing mistakes?
Would appreciate clarifications on these two please (otherwise I have understood the solution)








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    0














    I am attaching a photo of solved example for finite difference method. I have not understood the boundary condition at line two....should it not be at x=5 and y=4?(marked in pencil)



    Also in the third line from bottom, shouldn’t it be



    $a_0u_3 +a_1u_7 + a_2u_{10} + a_3u_2 + a_4u_6 = h^2G(x) = 4times48$.



    Is there a mistake in my understanding or are they printing mistakes?
    Would appreciate clarifications on these two please (otherwise I have understood the solution)








    finite-difference-methods







    share|cite|improve this question

























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      0








      0







      I am attaching a photo of solved example for finite difference method. I have not understood the boundary condition at line two....should it not be at x=5 and y=4?(marked in pencil)



      Also in the third line from bottom, shouldn’t it be



      $a_0u_3 +a_1u_7 + a_2u_{10} + a_3u_2 + a_4u_6 = h^2G(x) = 4times48$.



      Is there a mistake in my understanding or are they printing mistakes?
      Would appreciate clarifications on these two please (otherwise I have understood the solution)








      finite-difference-methods







      share|cite|improve this question













      I am attaching a photo of solved example for finite difference method. I have not understood the boundary condition at line two....should it not be at x=5 and y=4?(marked in pencil)



      Also in the third line from bottom, shouldn’t it be



      $a_0u_3 +a_1u_7 + a_2u_{10} + a_3u_2 + a_4u_6 = h^2G(x) = 4times48$.



      Is there a mistake in my understanding or are they printing mistakes?
      Would appreciate clarifications on these two please (otherwise I have understood the solution)








      finite-difference-methods




      finite-difference-methods






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Nov 21 '18 at 10:20









      SAK

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