.TH INTRO 3M "19 January 1983" .SH NAME intro \- introduction to mathematical library functions .SH DESCRIPTION These functions constitute the math library, .I libm. They are automatically loaded as needed by the Fortran compiler .IR f77 (1). The link editor searches this library under the \*(lq\-lm\*(rq option. Declarations for these functions may be obtained from the include file .RI < math.h >. .SH "LIST OF FUNCTIONS" .sp .ta 0.3i 2.5i .nf exp exponential log natural logarithm (see exp.3m) log10 logarithm to base 10 (see exp.3m) pow power (see exp.3m) sqrt square root (see exp.3m) fabs absolute value floor floor (see fabs.3m) ceil ceiling (see fabs.3m) gamma log gamma function hypot Euclidean distance cabs Euclidean distance (see hypot.3m) j0, j1, jn, y0, y1, yn bessel functions sin trigonometric sine cos trigonometric cosine (see sin.3m) tan trigonometric tangent (see sin.3m) asin trigonometric arcsine (see sin.3m) acos trigonometric arccosine (see sin.3m) atan trigonometric arctangent (see sin.3m) atan2 trigonometric arctangent (see sin.3m) sinh hyperbolic sine cosh hyperbolic cosine (see sinh.3m) tanh hyperbolic tangent (see sinh.3m) .fi