#5175: [bug] Bug computing Bessel function J0(0)
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Reporter: pdenapo | Owner: tbd
Type: defect | Status: new
Priority: major | Milestone:
Component: algebra | Keywords:
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A bug under sage 3.2.3 computing J_0(0)
(which should be just "1")
sage: g=Bessel(0)
sage: g
J_{0}
sage: g(1)
0.765197686557967
sage: g(0)
---------------------------------------------------------------------------
PariError Traceback (most recent call
last)
/home/pablo/sage/sage-3.1/<ipython console> in <module>()
/home/pablo/sage/sage-3.1/local/lib/python2.5/site-
packages/sage/functions/special.pyc in __call__(self, z)
689 return bessel_I(nu,z,algorithm=s,prec=p)
690 if t == "J":
--> 691 return bessel_J(nu,z,algorithm=s,prec=p)
692 if t == "K":
693 return bessel_K(nu,z,algorithm=s,prec=p)
/home/pablo/sage/sage-3.1/local/lib/python2.5/site-
packages/sage/functions/special.pyc in bessel_J(nu, z, algorithm, prec)
522 K = C
523 K = z.parent()
--> 524 return K(pari(nu).besselj(z, precision=prec))
525 elif algorithm=="scipy":
526 if prec != 53:
/home/pablo/sage/sage-3.1/local/lib/python2.5/site-
packages/sage/libs/pari/gen.so in sage.libs.pari.gen._pari_trap
(sage/libs/pari/gen.c:38645)()
PariError: (8)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5175>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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