Add complex number support for pow
#537
Merged
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This PR
pow
by documenting special cases. This PR indicates that implementations should handle special cases as ifpow
is implementedexp(x2*log(x1))
, following C99; however, implementations are allowed to handle special cases more carefully. Accordingly,pow
inherits a branch cut fromlog
. In general,pow
is underspecified, as handling all special cases is difficult given the number of argument permutations.References