LGAMMA (3)
log gamma function
SYNOPSIS
#include <math.h>
double lgamma(double x );
DESCRIPTION
The lgamma() function returns the log of the absolute value of
the Gamma function. The sign of the Gamma function is returned in the
external integer signgam.
For negative integer values of x, lgamma() returns HUGE_VAL
and errno is set to ERANGE.
ERRORS
ERANGE
Invalid argument - negative integer value of x.
CONFORMING TO
SEE ALSO
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