lsd_mkb/lsd_mkb_superlu/superlu_seq/dcomplex.c File Reference

Common arithmetic for complex type. More...

#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "slu_dcomplex.h"

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Functions
void	z_div (doublecomplex *c, doublecomplex *a, doublecomplex *b)
	Complex Division c = a/b.
double	z_abs (doublecomplex *z)
	Returns sqrt(z.r^2 + z.i^2).
double	z_abs1 (doublecomplex *z)
	Approximates the abs. Returns abs(z.r) + abs(z.i).
void	z_exp (doublecomplex *r, doublecomplex *z)
	Return the exponentiation.
void	d_cnjg (doublecomplex *r, doublecomplex *z)
	Return the complex conjugate.
double	d_imag (doublecomplex *z)
	Return the imaginary part.
doublecomplex	z_sgn (doublecomplex *z)
	SIGN functions for complex number. Returns z/abs(z).
doublecomplex	z_sqrt (doublecomplex *z)
	Square-root of a complex number.

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Detailed Description

Common arithmetic for complex type.

 -- SuperLU routine (version 2.0) --
 Univ. of California Berkeley, Xerox Palo Alto Research Center,
 and Lawrence Berkeley National Lab.
 November 15, 1997

 This file defines common arithmetic operations for complex type.
 

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Function Documentation

void d_cnjg	(	doublecomplex *	r,
		doublecomplex *	z
	)

Return the complex conjugate.

double d_imag

(

doublecomplex *

z

)

Return the imaginary part.

double z_abs

(

doublecomplex *

z

)

Returns sqrt(z.r^2 + z.i^2).

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double z_abs1

(

doublecomplex *

z

)

Approximates the abs. Returns abs(z.r) + abs(z.i).

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void z_div	(	doublecomplex *	c,
		doublecomplex *	a,
		doublecomplex *	b
	)

Complex Division c = a/b.

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void z_exp	(	doublecomplex *	r,
		doublecomplex *	z
	)

Return the exponentiation.

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doublecomplex z_sgn

(

doublecomplex *

z

)

SIGN functions for complex number. Returns z/abs(z).

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doublecomplex z_sqrt

(

doublecomplex *

z

)

Square-root of a complex number.