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Finding the maximum value on a restricted interval

Hi,

I have the following function that I'm trying to maximize with respect to tau, but tau should be in a certain interval. And I know that I'm missing something, but can not find what as when I run my code I do not obtain anything. Maybe I'm using the wrong function, but even with Maxvalue I had the same issue. Any advice would be welcome,

Best,

Xavier Koch

Attachments:
Function to max.nb
POSTED BY: Xavier Koch
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POSTED BY: Gianluca Gorni

I've noticed that the original file is from an advanced version and not everyone can open it so here's a better version.

Attachments:
Function to max 1.nb
POSTED BY: Xavier Koch

Thanks for your reply, how should I write the assumptions then if this method is not efficient? Also, I don't see how the constraints could not match as they are just limiting the maximum value [Tau] can take.
POSTED BY: Xavier Koch

Beware that if you write

$Assumptions = a > 0
$Assumptions = \[Beta] > 0

the second line overrides the first one. It seems that your assumptions are not compatible with the constraint you impose on the variable \[Tau].
POSTED BY: Gianluca Gorni
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