EXPM1(1)            Linux Programmer's Manual            EXPM1(1)



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(1) 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  inac-
       curate  due  to subtraction of two numbers that are nearly
       equal.

       log1p(p) 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(p), log(g)



GNU                         1995-09-16                   EXPM1(1)