lsd_mkb/lsd_mkb_superlu/superlu_seq/slu_dcomplex.h File Reference

Header file for complex operations. More...

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Classes
struct	doublecomplex
Defines
#define	z_add(c, a, b)
	Complex Addition c = a + b.
#define	z_sub(c, a, b)
	Complex Subtraction c = a - b.
#define	zd_mult(c, a, b)
	Complex-Double Multiplication.
#define	zz_mult(c, a, b)
	Complex-Complex Multiplication.
#define	zz_conj(a, b)
#define	z_eq(a, b)   ( (a)->r == (b)->r && (a)->i == (b)->i )
	Complex equality testing.
Functions
void	z_div (doublecomplex *, doublecomplex *, doublecomplex *)
	Complex Division c = a/b.
double	z_abs (doublecomplex *)
	Returns sqrt(z.r^2 + z.i^2).
double	z_abs1 (doublecomplex *)
	Approximates the abs. Returns abs(z.r) + abs(z.i).
void	z_exp (doublecomplex *, doublecomplex *)
	Return the exponentiation.
void	d_cnjg (doublecomplex *r, doublecomplex *z)
	Return the complex conjugate.
double	d_imag (doublecomplex *)
	Return the imaginary part.
doublecomplex	z_sgn (doublecomplex *)
	SIGN functions for complex number. Returns z/abs(z).
doublecomplex	z_sqrt (doublecomplex *)
	Square-root of a complex number.

---

Detailed Description

Header file for complex operations.

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

 Contains definitions for various complex operations.
 This header file is to be included in source files z*.c
 

---

Define Documentation

#define z_add	(	c,
		a,
		b		)

Value:

{ (c)->r = (a)->r + (b)->r; \
             (c)->i = (a)->i + (b)->i; }

Complex Addition c = a + b.

#define z_eq	(	a,
		b		)	( (a)->r == (b)->r && (a)->i == (b)->i )

Complex equality testing.

#define z_sub	(	c,
		a,
		b		)

Value:

{ (c)->r = (a)->r - (b)->r; \
             (c)->i = (a)->i - (b)->i; }

Complex Subtraction c = a - b.

#define zd_mult	(	c,
		a,
		b		)

Value:

{ (c)->r = (a)->r * (b); \
                           (c)->i = (a)->i * (b); }

Complex-Double Multiplication.

#define zz_conj	(	a,
		b		)

Value:

{ \
        (a)->r = (b)->r; \
        (a)->i = -((b)->i); \
    }

#define zz_mult	(	c,
		a,
		b		)

Value:

{ \
    double cr, ci; \
        cr = (a)->r * (b)->r - (a)->i * (b)->i; \
        ci = (a)->i * (b)->r + (a)->r * (b)->i; \
        (c)->r = cr; \
        (c)->i = ci; \
    }

Complex-Complex Multiplication.

---

Function Documentation

void d_cnjg	(	doublecomplex *	r,
		doublecomplex *	z
	)

Return the complex conjugate.

double d_imag

(

doublecomplex *

)

Return the imaginary part.

double z_abs

(

doublecomplex *

)

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

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double z_abs1

(

doublecomplex *

)

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

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void z_div	(	doublecomplex *	,
		doublecomplex *	,
		doublecomplex *
	)

Complex Division c = a/b.

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void z_exp	(	doublecomplex *	,
		doublecomplex *
	)

Return the exponentiation.

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doublecomplex z_sgn

(

doublecomplex *

)

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

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doublecomplex z_sqrt

(

doublecomplex *

)

Square-root of a complex number.