[Libreoffice-bugs] [Bug 117893] New: besselj gives error for negative order

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=117893

            Bug ID: 117893
           Summary: besselj gives error for negative order
           Product: LibreOffice
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: kent at drdoppler.com

=besselj(3.8,2) gives .409. Good
=besselj(3.8,-2) gives err502. Bad. It should give the same answer
=besselj(3.8,3) gives .418. Good
=besselj(3.8,-3) gives err502. Bad. It should give -.418
In general
besselj(x,-even order)=besselj(x,+even order) (behaves like cos(-x)=cos(x))
besselj(x,-odd order)=-besselj(x,+odd order) (behaves like sin(-x)=-sin(x))
Kent

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