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integrals with real variables #25005

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matswb mannequin opened this issue Mar 18, 2018 · 2 comments
Closed

integrals with real variables #25005

matswb mannequin opened this issue Mar 18, 2018 · 2 comments
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c: calculus t: enhancement

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@matswb
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matswb mannequin commented Mar 18, 2018

It seems to me that

assume(x, 'real')
integral(1/x, x)

should return

log(abs(x))

but it returns

log(x)

But maybe I am missing something.

CC: @slel

Component: calculus

Keywords: integral real variable

Issue created by migration from https://trac.sagemath.org/ticket/25005
@matswb matswb mannequin added this to the sage-8.2 milestone Mar 18, 2018
@matswb matswb mannequin added p: major / 3 labels Mar 18, 2018
@fchapoton
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comment:1

on the negative real axis, log(abs(x)) and log(x) differ by a multiple of I pi, so they are equally valid primitives.

@fchapoton fchapoton removed this from the sage-8.2 milestone Jan 5, 2022
@slel
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slel commented Jan 5, 2022

comment:2

Do we need a new real_valued_integral function?

@mkoeppe mkoeppe closed this as not planned Won't fix, can't repro, duplicate, stale Feb 8, 2023
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@slel @fchapoton @mkoeppe