Optimizing over an Integral












0












$begingroup$


I have to solve the following optimization problem:



$max_tau int_underline{epsilon}^bar{epsilon} tau(1-tau)^epsilon depsilon$



How does one solve these with the integral. I think I may be able to do it point-wise but I am not sure.










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  • $begingroup$
    Is $tau$ a number or a function?
    $endgroup$
    – Botond
    Jan 14 at 15:44










  • $begingroup$
    @Botond its a number.
    $endgroup$
    – user52932
    Jan 14 at 21:40










  • $begingroup$
    Then @lightxbulb's answer is a good way to do it.
    $endgroup$
    – Botond
    Jan 14 at 21:44












  • $begingroup$
    @Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
    $endgroup$
    – user52932
    Jan 14 at 21:55










  • $begingroup$
    @user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
    $endgroup$
    – lightxbulb
    Jan 14 at 22:09
















0












$begingroup$


I have to solve the following optimization problem:



$max_tau int_underline{epsilon}^bar{epsilon} tau(1-tau)^epsilon depsilon$



How does one solve these with the integral. I think I may be able to do it point-wise but I am not sure.










share|cite|improve this question









$endgroup$












  • $begingroup$
    Is $tau$ a number or a function?
    $endgroup$
    – Botond
    Jan 14 at 15:44










  • $begingroup$
    @Botond its a number.
    $endgroup$
    – user52932
    Jan 14 at 21:40










  • $begingroup$
    Then @lightxbulb's answer is a good way to do it.
    $endgroup$
    – Botond
    Jan 14 at 21:44












  • $begingroup$
    @Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
    $endgroup$
    – user52932
    Jan 14 at 21:55










  • $begingroup$
    @user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
    $endgroup$
    – lightxbulb
    Jan 14 at 22:09














0












0








0





$begingroup$


I have to solve the following optimization problem:



$max_tau int_underline{epsilon}^bar{epsilon} tau(1-tau)^epsilon depsilon$



How does one solve these with the integral. I think I may be able to do it point-wise but I am not sure.










share|cite|improve this question









$endgroup$




I have to solve the following optimization problem:



$max_tau int_underline{epsilon}^bar{epsilon} tau(1-tau)^epsilon depsilon$



How does one solve these with the integral. I think I may be able to do it point-wise but I am not sure.







integration optimization maxima-minima






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share|cite|improve this question











share|cite|improve this question




share|cite|improve this question










asked Jan 14 at 15:37









user52932user52932

55114




55114












  • $begingroup$
    Is $tau$ a number or a function?
    $endgroup$
    – Botond
    Jan 14 at 15:44










  • $begingroup$
    @Botond its a number.
    $endgroup$
    – user52932
    Jan 14 at 21:40










  • $begingroup$
    Then @lightxbulb's answer is a good way to do it.
    $endgroup$
    – Botond
    Jan 14 at 21:44












  • $begingroup$
    @Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
    $endgroup$
    – user52932
    Jan 14 at 21:55










  • $begingroup$
    @user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
    $endgroup$
    – lightxbulb
    Jan 14 at 22:09


















  • $begingroup$
    Is $tau$ a number or a function?
    $endgroup$
    – Botond
    Jan 14 at 15:44










  • $begingroup$
    @Botond its a number.
    $endgroup$
    – user52932
    Jan 14 at 21:40










  • $begingroup$
    Then @lightxbulb's answer is a good way to do it.
    $endgroup$
    – Botond
    Jan 14 at 21:44












  • $begingroup$
    @Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
    $endgroup$
    – user52932
    Jan 14 at 21:55










  • $begingroup$
    @user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
    $endgroup$
    – lightxbulb
    Jan 14 at 22:09
















$begingroup$
Is $tau$ a number or a function?
$endgroup$
– Botond
Jan 14 at 15:44




$begingroup$
Is $tau$ a number or a function?
$endgroup$
– Botond
Jan 14 at 15:44












$begingroup$
@Botond its a number.
$endgroup$
– user52932
Jan 14 at 21:40




$begingroup$
@Botond its a number.
$endgroup$
– user52932
Jan 14 at 21:40












$begingroup$
Then @lightxbulb's answer is a good way to do it.
$endgroup$
– Botond
Jan 14 at 21:44






$begingroup$
Then @lightxbulb's answer is a good way to do it.
$endgroup$
– Botond
Jan 14 at 21:44














$begingroup$
@Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
$endgroup$
– user52932
Jan 14 at 21:55




$begingroup$
@Botond The issue I am running into is that when I do that, I am unable to express tau as a function of just b and a. That is I am unable to get a closed form expression. What does this mean?
$endgroup$
– user52932
Jan 14 at 21:55












$begingroup$
@user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
$endgroup$
– lightxbulb
Jan 14 at 22:09




$begingroup$
@user52932 You'll have to analyze a number of cases for different intervals of $a$ and $b$.
$endgroup$
– lightxbulb
Jan 14 at 22:09










1 Answer
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$begingroup$

Try integrating:
$$tauint_{a}^{b}{(1-tau)^xdx} =left. frac{tau(1-tau)^x}{log(1-tau)} right|_a^b$$
Then take the derivative with respect to $tau$ to find the extrema.






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    $begingroup$

    Try integrating:
    $$tauint_{a}^{b}{(1-tau)^xdx} =left. frac{tau(1-tau)^x}{log(1-tau)} right|_a^b$$
    Then take the derivative with respect to $tau$ to find the extrema.






    share|cite|improve this answer











    $endgroup$


















      1












      $begingroup$

      Try integrating:
      $$tauint_{a}^{b}{(1-tau)^xdx} =left. frac{tau(1-tau)^x}{log(1-tau)} right|_a^b$$
      Then take the derivative with respect to $tau$ to find the extrema.






      share|cite|improve this answer











      $endgroup$
















        1












        1








        1





        $begingroup$

        Try integrating:
        $$tauint_{a}^{b}{(1-tau)^xdx} =left. frac{tau(1-tau)^x}{log(1-tau)} right|_a^b$$
        Then take the derivative with respect to $tau$ to find the extrema.






        share|cite|improve this answer











        $endgroup$



        Try integrating:
        $$tauint_{a}^{b}{(1-tau)^xdx} =left. frac{tau(1-tau)^x}{log(1-tau)} right|_a^b$$
        Then take the derivative with respect to $tau$ to find the extrema.







        share|cite|improve this answer














        share|cite|improve this answer



        share|cite|improve this answer








        edited Jan 14 at 15:53









        MPW

        30.9k12157




        30.9k12157










        answered Jan 14 at 15:47









        lightxbulblightxbulb

        1,140311




        1,140311






























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