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Re: [Patch, Fortran, Doc] Inverse hyperbolic functions


Janus Weil wrote:

a colleague of mine recently noticed that the description of the
inverse hyperbolic functions in the gfortran manual is not quite
correct, i.e. ATANH is not the "hyperbolic arctangent" but the
"hyperbolic area tangent". Same goes for ASINH and ACOSH. Note that
the F08 standard simply speaks about ATANH as the "inverse hyperbolic
tangent".

I will commit the attached patch to trunk and 4.5 shortly (tested with
"make pdf").

OK, I finally found a reference to "area" function by perusing the German Wikipedia (http://de.wikipedia.org/wiki/Hyperbolischer_Tangens),
see the Umkehrfunktionen paragraph:


Der Tangens Hyperbolicus ist eine Bijektion ... Die Umkehrfunktion nennt man Areatangens Hyperbolicus

Ah - there it is !

So it is indeed a difference between German and Anglo-Saxon terminology.

Cheers,

--
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran


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