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Don't allow differentiation with respect to order in Bessel functions #15019

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eviatarbach opened this issue Aug 7, 2013 · 8 comments
Closed

Don't allow differentiation with respect to order in Bessel functions #15019

eviatarbach opened this issue Aug 7, 2013 · 8 comments
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c: symbolics p: blocker / 1 t: bug
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sage-5.11

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@eviatarbach
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This is wrong:

sage: var('nu z')
(nu, z)
sage: bessel_J(nu, z).diff(nu)
-1/2*bessel_J(nu + 1, z) + 1/2*bessel_J(nu - 1, z)
sage: bessel_J(nu, z).diff(z)
-1/2*bessel_J(nu + 1, z) + 1/2*bessel_J(nu - 1, z)

Apply attachment: trac15019.patch​

Component: symbolics

Author: Eviatar Bach

Reviewer: Volker Braun

Merged: sage-5.11.rc1

Issue created by migration from https://trac.sagemath.org/ticket/15019
@eviatarbach eviatarbach added this to the sage-5.11 milestone Aug 7, 2013
@eviatarbach
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comment:1

Attachment: trac15019.patch.gz

@vbraun
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vbraun commented Aug 7, 2013

Reviewer: Volker Braun

@vbraun
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vbraun commented Aug 7, 2013

Author: Evitar Bach

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@vbraun
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vbraun commented Aug 7, 2013

comment:2

Looks good to me

@eviatarbach
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Changed author from Evitar Bach to Eviatar Bach

@eviatarbach
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comment:4

Thanks!

@jdemeyer
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Merged: sage-5.11.rc1

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