#4102: make bessel_J symbolic
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Reporter: jwmerrill | Owner: burcin
Type: enhancement | Status: closed
Priority: major | Milestone: sage-5.11
Component: calculus | Resolution: fixed
Keywords: sd48 | Merged in: sage-5.11.rc0
Authors: Benjamin Jones, | Reviewers: Karl-Dieter Crisman,
Eviatar Bach, Volker Braun | Burcin Erocal
Report Upstream: N/A | Work issues:
Branch: | Dependencies: #9880
Stopgaps: |
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Comment (by eviatarbach):
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)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/4102#comment:82>
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