> On 18 May 2021, at 20:30, Ben Bolker <bbol...@gmail.com> wrote:
>
> On my system (Ubuntu), 'man 3 catan' gives documentation on the function,
> and says "The real part of y is chosen in the interval [-pi/2,pi/2]" - but
> that _could_ be system-dependent.
My copy of "C in a Nutshell" suggests that this requirement is part of the C99
standard (specified for catanh).
Best,
Stefan
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