[ https://issues.oasis-open.org/browse/OFFICE-4005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=72225#comment-72225 ]
Andreas Guelzow commented on OFFICE-4005:
-----------------------------------------
1.2 has:
Summary: Returns the Bessel function of integer order Jn(x) (cylinder function)
Syntax: BESSELJ( Integer X ; Number N )
Returns: Number
Constraints: N >= 0, INT(N)=N; Evaluators may evaluate expressions where N >= 0 returns a
non-error value.
Semantics: Computes the Bessel function of integer order Jn(x). N is also known as the order.
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This issue talks about N, but why is X an integer?
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> Remove "non-negative integer" constraint from BESSELJ function
> --------------------------------------------------------------
>
> Key: OFFICE-4005
> URL: https://issues.oasis-open.org/browse/OFFICE-4005
> Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
> Issue Type: Improvement
> Components: OpenFormula
> Environment: as per 11/26/2018
> Â
> Reporter: Regina Henschel
> Priority: Minor
>
> The BESSELJ function ( section 6.16.13 in ODF1.3 draft) has the Constraints "N >= 0, INT(N)=N; Evaluators may evaluate expressions where N >= 0 returns a non-error value."
> But the order N need not be non-negative, there exists reflection formulae. And the order N need not be integer, fractional order, especially half-integer is used too.
> References:
> [http://functions.wolfram.com/webMathematica/FunctionPlotting.jsp?name=BesselJ&ptype=3&n=1&z=1&threeDtype2=0&part2=0&free1=n&free2=z&Min1=-5&Max1=5&Min2=-5&Max2=5]
> [https://en.wikipedia.org/wiki/Bessel_function]
> [https://www.boost.org/doc/libs/1_48_0/libs/math/doc/sf_and_dist/html/math_toolkit/special/bessel/bessel.html]
> [https://stat.ethz.ch/R-manual/R-devel/library/base/html/Bessel.html]
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