#17678: special values of Bessel functions
-------------------------+-------------------------------------------------
Reporter: rws | Owner:
Type: | Status: needs_review
enhancement | Milestone: sage-6.10
Priority: major | Resolution:
Component: | Merged in:
symbolics | Reviewers: Karl-Dieter Crisman
Keywords: | Work issues:
Authors: Ralf | Commit:
Stephan | 8267479effcda361511e0b3c50dc2e86bbe94a54
Report Upstream: N/A | Stopgaps:
Branch: |
u/rws/17678-1 |
Dependencies: |
#17777 |
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Comment (by kcrisman):
Thanks for opening that ticket, that is fine for that issue.
Still a problem here:
{{{
sage: bessel_Y(-3,0)
Infinity
sage: bessel_Y(3,0)
Infinity
sage: bessel_Y(3.1,0)
-infinity
sage: bessel_Y(3.2,0)
-infinity
sage: bessel_Y(-3.2,0)
+infinity
sage: bessel_Y(-3.3,0)
+infinity
sage: bessel_Y(-33/10,0)
Infinity
}}}
Extra `var('n')`?
{{{
+ def _eval_(self, n, x):
+ """
+ EXAMPLES::
+
+ sage: n = var('n')
+ sage: bessel_Y(1, 0)
+ Infinity
+ sage: bessel_Y(1/2, x)
+ -sqrt(2)*sqrt(1/(pi*x))*cos(x)
+ sage: bessel_Y(-1/2, x)
+ sqrt(2)*sqrt(1/(pi*x))*sin(x)
+ """
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17678#comment:24>
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