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Karim Belabas on Sat, 15 Apr 2023 23:12:51 +0200
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Re: How to compute modulo a complex ?
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- To: tony.reix@laposte.net
- Subject: Re: How to compute modulo a complex ?
- From: Karim Belabas <Karim.Belabas@math.u-bordeaux.fr>
- Date: Sat, 15 Apr 2023 23:11:27 +0200
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* tony.reix@laposte.net [2023-04-15 22:50]:
> Hi,I want to do:
> s=5
> s=Mod( (s^2-1)/(2*I*s) , 4 I )
> where I is the imaginary number. When trying, I get a forbiden
> division between polmod and complex.
No direct way. You can use the following function:
cxmod(a, b) = my(q = a/b); a - (floor(real(q)) + I * floor(imag(q))) * b;
Cheers,
K.B.
--
Pr Karim Belabas, U. Bordeaux, Vice-président en charge du Numérique
Institut de Mathématiques de Bordeaux UMR 5251 - (+33) 05 40 00 29 77
http://www.math.u-bordeaux.fr/~kbelabas/