redhat man page for expm1

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)