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RedHat 9 (Linux i386) - man page for expm1 (redhat section 3)

EXPM1(3)						     Linux Programmer's Manual							  EXPM1(3)

NAME
expm1, log1p - exponential minus 1, logarithm of 1 plus argument
SYNOPSIS
#include <math.h> double expm1(double x); double log1p(double x);
DESCRIPTION
expm1(x) returns a value equivalent to `exp (x) - 1'. It is computed in a way that is accurate even if the value of x is near zero--a case where `exp (x) - 1' would be inaccurate due to subtraction of two numbers that are nearly equal. log1p(x) returns a value equivalent to `log (1 + x)'. It is computed in a way that is accurate even if the value of x is near zero.
CONFORMING TO
BSD
SEE ALSO
exp(3), log(3)
GNU
1995-09-16 EXPM1(3)

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