Expressing $c = 1 - expleft(lambda_1 p + lambda_3 qright)$ as a product of two terms












2












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This question is motivated by the response provided in this question



Considering the same equation which is shown below
$$c = 1 - expleft(lambda_1 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right) + lambda_3 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right)right)$$



It has been proven that it cannot be expressed as a sum. Still, I am wondering if I can express this as a product like $c = x * y$, where $x$ is in terms of $lambda_1$, and $y$ is in terms of $lambda_3 $? I will appreciate insights on this matter.



Pardon, I am asking a similar question, but as you can see, the dimensions are different.










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$endgroup$

















    2












    $begingroup$


    This question is motivated by the response provided in this question



    Considering the same equation which is shown below
    $$c = 1 - expleft(lambda_1 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right) + lambda_3 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right)right)$$



    It has been proven that it cannot be expressed as a sum. Still, I am wondering if I can express this as a product like $c = x * y$, where $x$ is in terms of $lambda_1$, and $y$ is in terms of $lambda_3 $? I will appreciate insights on this matter.



    Pardon, I am asking a similar question, but as you can see, the dimensions are different.










    share|cite|improve this question











    $endgroup$















      2












      2








      2





      $begingroup$


      This question is motivated by the response provided in this question



      Considering the same equation which is shown below
      $$c = 1 - expleft(lambda_1 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right) + lambda_3 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right)right)$$



      It has been proven that it cannot be expressed as a sum. Still, I am wondering if I can express this as a product like $c = x * y$, where $x$ is in terms of $lambda_1$, and $y$ is in terms of $lambda_3 $? I will appreciate insights on this matter.



      Pardon, I am asking a similar question, but as you can see, the dimensions are different.










      share|cite|improve this question











      $endgroup$




      This question is motivated by the response provided in this question



      Considering the same equation which is shown below
      $$c = 1 - expleft(lambda_1 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right) + lambda_3 R^2 left(frac{2pi}{3}-frac{sqrt{3}}{2}right)right)$$



      It has been proven that it cannot be expressed as a sum. Still, I am wondering if I can express this as a product like $c = x * y$, where $x$ is in terms of $lambda_1$, and $y$ is in terms of $lambda_3 $? I will appreciate insights on this matter.



      Pardon, I am asking a similar question, but as you can see, the dimensions are different.







      exponential-function exponential-sum






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      edited Jan 12 at 3:31







      Abdulhameed

















      asked Jan 12 at 3:17









      AbdulhameedAbdulhameed

      153115




      153115






















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          $begingroup$

          Similarly as for the additive case, this is not possible unless $lambda_1=0$ or $lambda_3=0$ or $R=0$.



          Suppose there exist two functions $x$ and $y$ such that
          $$x(lambda_1)y(lambda_3)=1 - expleft(lambda_1 p + lambda_3 qright)$$
          Then note that $x(0)y(0)=1-1=0$.
          Also
          $$ x(lambda_1)y(0)=1-e^{lambda_1p}$$
          $$ x(0)y(lambda_3)=1-e^{lambda_3q}$$
          Multiplying the two yields
          $$ x(lambda_1)y(lambda_3)x(0)y(0)=(1-e^{lambda_1p})(1-e^{lambda_3q})$$
          But since $x(0)y(0)=0$, that means
          $$(1-e^{lambda_1p})(1-e^{lambda_3q})=0$$
          which implies that $lambda_1=0$ or $lambda_3=0$ or $R=0$.






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            1 Answer
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            active

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            3












            $begingroup$

            Similarly as for the additive case, this is not possible unless $lambda_1=0$ or $lambda_3=0$ or $R=0$.



            Suppose there exist two functions $x$ and $y$ such that
            $$x(lambda_1)y(lambda_3)=1 - expleft(lambda_1 p + lambda_3 qright)$$
            Then note that $x(0)y(0)=1-1=0$.
            Also
            $$ x(lambda_1)y(0)=1-e^{lambda_1p}$$
            $$ x(0)y(lambda_3)=1-e^{lambda_3q}$$
            Multiplying the two yields
            $$ x(lambda_1)y(lambda_3)x(0)y(0)=(1-e^{lambda_1p})(1-e^{lambda_3q})$$
            But since $x(0)y(0)=0$, that means
            $$(1-e^{lambda_1p})(1-e^{lambda_3q})=0$$
            which implies that $lambda_1=0$ or $lambda_3=0$ or $R=0$.






            share|cite|improve this answer









            $endgroup$


















              3












              $begingroup$

              Similarly as for the additive case, this is not possible unless $lambda_1=0$ or $lambda_3=0$ or $R=0$.



              Suppose there exist two functions $x$ and $y$ such that
              $$x(lambda_1)y(lambda_3)=1 - expleft(lambda_1 p + lambda_3 qright)$$
              Then note that $x(0)y(0)=1-1=0$.
              Also
              $$ x(lambda_1)y(0)=1-e^{lambda_1p}$$
              $$ x(0)y(lambda_3)=1-e^{lambda_3q}$$
              Multiplying the two yields
              $$ x(lambda_1)y(lambda_3)x(0)y(0)=(1-e^{lambda_1p})(1-e^{lambda_3q})$$
              But since $x(0)y(0)=0$, that means
              $$(1-e^{lambda_1p})(1-e^{lambda_3q})=0$$
              which implies that $lambda_1=0$ or $lambda_3=0$ or $R=0$.






              share|cite|improve this answer









              $endgroup$
















                3












                3








                3





                $begingroup$

                Similarly as for the additive case, this is not possible unless $lambda_1=0$ or $lambda_3=0$ or $R=0$.



                Suppose there exist two functions $x$ and $y$ such that
                $$x(lambda_1)y(lambda_3)=1 - expleft(lambda_1 p + lambda_3 qright)$$
                Then note that $x(0)y(0)=1-1=0$.
                Also
                $$ x(lambda_1)y(0)=1-e^{lambda_1p}$$
                $$ x(0)y(lambda_3)=1-e^{lambda_3q}$$
                Multiplying the two yields
                $$ x(lambda_1)y(lambda_3)x(0)y(0)=(1-e^{lambda_1p})(1-e^{lambda_3q})$$
                But since $x(0)y(0)=0$, that means
                $$(1-e^{lambda_1p})(1-e^{lambda_3q})=0$$
                which implies that $lambda_1=0$ or $lambda_3=0$ or $R=0$.






                share|cite|improve this answer









                $endgroup$



                Similarly as for the additive case, this is not possible unless $lambda_1=0$ or $lambda_3=0$ or $R=0$.



                Suppose there exist two functions $x$ and $y$ such that
                $$x(lambda_1)y(lambda_3)=1 - expleft(lambda_1 p + lambda_3 qright)$$
                Then note that $x(0)y(0)=1-1=0$.
                Also
                $$ x(lambda_1)y(0)=1-e^{lambda_1p}$$
                $$ x(0)y(lambda_3)=1-e^{lambda_3q}$$
                Multiplying the two yields
                $$ x(lambda_1)y(lambda_3)x(0)y(0)=(1-e^{lambda_1p})(1-e^{lambda_3q})$$
                But since $x(0)y(0)=0$, that means
                $$(1-e^{lambda_1p})(1-e^{lambda_3q})=0$$
                which implies that $lambda_1=0$ or $lambda_3=0$ or $R=0$.







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered Jan 12 at 4:01









                Stefan LafonStefan Lafon

                1,87818




                1,87818






























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