TypeError: Computation failed since Maxima requested additional constraints

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ck
3 ●1 ●1 ●4

I have the following code:

 N, n, f  = var('N, n, f')
 assume(N>0)
 sum(binomial(N, n)*f^n*(1-f)^(N-n), n, (N+1)/2, N)

It gives me the following error message:

 TypeError: Computation failed since Maxima requested additional constraints (try the command  'assume(N+1>0)' before integral or limit evaluation, for example): Is  N+1  positive, negative, or zero?

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answered 13 years ago

kcrisman
12242 ●42 ●136 ●255

This is a typical error message from Sage via Maxima.

But maybe I need an update from you. I get

sage: N, n, f  = var('N, n, f')
sage:  assume(N>0)
sage:  sum(binomial(N, n)*f^n*(1-f)^(N-n), n, (N+1)/2, N)
sum((-f + 1)^(N - n)*f^n*binomial(N, n), n, 1/2*N + 1/2, N)

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For some reason, it works now for me as well. (Maybe I had some inconsistent variable definitions I did not flush out or something). Thanks for checking.

ck ( 13 years ago )

Likely. Glad you're set now!

kcrisman ( 13 years ago )

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Asked: 13 years ago

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Last updated: Sep 22 '11

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