[Bug libstdc++/83566] cyl_bessel_j returns wrong result for x>1000 for high orders.

mpezz at tiscali dot it gcc-bugzilla@gcc.gnu.org
Mon Jan 1 02:40:00 GMT 2018


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83566

Michele Pezzutti <mpezz at tiscali dot it> changed:

           What    |Removed                     |Added
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                 CC|                            |mpezz at tiscali dot it

--- Comment #2 from Michele Pezzutti <mpezz at tiscali dot it> ---
Series expansion in __cyl_bessel_jn_asymp() shall not be truncated at the first
terms. At least nu/2 terms shall be added, in order to have a guaranteed error
bound.
Patch proposed to mailing list.


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