Re: factor(3*x) = x ?!!

Loïc Grenié on Fri, 14 Jun 2024 10:37:34 +0200

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Re: factor(3*x) = x ?!!

To: tony.reix@laposte.net
Subject: Re: factor(3*x) = x ?!!
From: Loïc Grenié <loic.grenie@gmail.com>
Date: Fri, 14 Jun 2024 10:37:19 +0200
Cc: Pari Users <pari-users@pari.math.u-bordeaux.fr>
Delivery-date: Fri, 14 Jun 2024 10:37:34 +0200
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Le ven. 14 juin 2024 à 09:35, <tony.reix@laposte.net> a écrit :

‌Hello,

Is that a bug or a feature ?

(done on Web-GP just now - v2.15.5.28239."6c020b568b". Same on paridroid on my Android smartphone - v2.15.3.2.3. Same on Linux - v2.13.3. Same on Windows - v2.15.4).

? factor(x)
%2 = Mat([x, 1])

? factor(3)
%3 = Mat([3, 1])

? factor(3*x)
%4 = Mat([x, 1])

???

It's a feature. The polynomial is factored in Q[x], and in Q[x] 3 is invertible.

Hope this helps,

Loïc

Follow-Ups:
- Re: factor(3*x) = x ?!!
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