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)