tail head cat sleep
QR code linking to this page

Manual Pages  — CEXP

NAME

cexp, cexpf – complex exponential functions

CONTENTS

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <complex.h>

double complex
cexp(double complex z);

float complex
cexpf(float complex z);

DESCRIPTION

The cexp() and cexpf() functions compute the complex exponential of z, also known as cis( z, Ns).

RETURN VALUES

For real numbers x and y, cexp() behaves according to Euler's formula: cexp(x + I*y) = ( e** x, * cos( y, Ns, Pc, Pc, +, Po, Ns I * e** x * sin( y, Ns, Pc, Pc

Generally speaking, infinities, zeroes and NaNs are handled as would be expected from this identity given the usual rules of floating-point arithmetic. However, care is taken to avoid generating NaNs when they are not deserved. For example, mathematically we expect that cimag(cexp(x + I*0)) = 0 regardless of the value of x, and cexp() preserves this identity even if x is ∞ or NaN. Likewise, cexp(-∞ + I*y) = 0 and creal(cexp(∞ + I*y)) = ∞ for any y (even though the latter property is only mathematically true for representable y, .) If y is not finite, the sign of the result is indeterminate.

SEE ALSO

complex(3), exp(3), math(3)

STANDARDS

The cexp() and cexpf() functions conform to ISO/IEC 9899:1999 ("ISO C99").

CEXP (3) March 6, 2011

tail head cat sleep
QR code linking to this page


Please direct any comments about this manual page service to Ben Bullock. Privacy policy.

The last good thing written in C was Franz Schubert's Symphony #9.
— Erwin Dietrich