·  Home
+   man pages
 -> Linux -> FreeBSD -> OpenBSD -> NetBSD -> Tru64 Unix -> HP-UX 11i -> IRIX
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

man pages->IRIX man pages -> complib/zsptrs (3)
 Title
 Content
 Arch
 Section All Sections 1 - General Commands 2 - System Calls 3 - Subroutines 4 - Special Files 5 - File Formats 6 - Games 7 - Macros and Conventions 8 - Maintenance Commands 9 - Kernel Interface n - New Commands

### Contents

```
ZSPTRS(3F)							    ZSPTRS(3F)

```

### NAME[Toc][Back]

```     ZSPTRS - solve a system of	linear equations A*X = B with a	complex
symmetric matrix A	stored in packed format	using the factorization	A =
U*D*U**T or A = L*D*L**T computed by ZSPTRF
```

### SYNOPSIS[Toc][Back]

```     SUBROUTINE	ZSPTRS(	UPLO, N, NRHS, AP, IPIV, B, LDB, INFO )

CHARACTER	UPLO

INTEGER	INFO, LDB, N, NRHS

INTEGER	IPIV( *	)

COMPLEX*16	AP( * ), B( LDB, * )
```

### PURPOSE[Toc][Back]

```     ZSPTRS solves a system of linear equations	A*X = B	with a complex
symmetric matrix A	stored in packed format	using the factorization	A =
U*D*U**T or A = L*D*L**T computed by ZSPTRF.

```

### ARGUMENTS[Toc][Back]

```     UPLO    (input) CHARACTER*1
Specifies whether the details of the factorization	are stored as
an	upper or lower triangular matrix.  = 'U':  Upper triangular,
form is A = U*D*U**T;
= 'L':  Lower triangular, form is A = L*D*L**T.

N	     (input) INTEGER
The order of the matrix A.	 N >= 0.

NRHS    (input) INTEGER
The number	of right hand sides, i.e., the number of columns of
the matrix	B.  NRHS >= 0.

AP	     (input) COMPLEX*16	array, dimension (N*(N+1)/2)
The block diagonal	matrix D and the multipliers used to obtain
the factor	U or L as computed by ZSPTRF, stored as	a packed
triangular	matrix.

IPIV    (input) INTEGER array, dimension (N)
Details of	the interchanges and the block structure of D as
determined	by ZSPTRF.

B	     (input/output) COMPLEX*16 array, dimension	(LDB,NRHS)
On	entry, the right hand side matrix B.  On exit, the solution
matrix X.

LDB     (input) INTEGER
The leading dimension of the array	B.  LDB	>= max(1,N).

Page 1

ZSPTRS(3F)							    ZSPTRS(3F)

INFO    (output) INTEGER
= 0:  successful exit
< 0: if INFO = -i,	the i-th argument had an illegal value
ZSPTRS(3F)							    ZSPTRS(3F)

```

### NAME[Toc][Back]

```     ZSPTRS - solve a system of	linear equations A*X = B with a	complex
symmetric matrix A	stored in packed format	using the factorization	A =
U*D*U**T or A = L*D*L**T computed by ZSPTRF
```

### SYNOPSIS[Toc][Back]

```     SUBROUTINE	ZSPTRS(	UPLO, N, NRHS, AP, IPIV, B, LDB, INFO )

CHARACTER	UPLO

INTEGER	INFO, LDB, N, NRHS

INTEGER	IPIV( *	)

COMPLEX*16	AP( * ), B( LDB, * )
```

### PURPOSE[Toc][Back]

```     ZSPTRS solves a system of linear equations	A*X = B	with a complex
symmetric matrix A	stored in packed format	using the factorization	A =
U*D*U**T or A = L*D*L**T computed by ZSPTRF.

```

### ARGUMENTS[Toc][Back]

```     UPLO    (input) CHARACTER*1
Specifies whether the details of the factorization	are stored as
an	upper or lower triangular matrix.  = 'U':  Upper triangular,
form is A = U*D*U**T;
= 'L':  Lower triangular, form is A = L*D*L**T.

N	     (input) INTEGER
The order of the matrix A.	 N >= 0.

NRHS    (input) INTEGER
The number	of right hand sides, i.e., the number of columns of
the matrix	B.  NRHS >= 0.

AP	     (input) COMPLEX*16	array, dimension (N*(N+1)/2)
The block diagonal	matrix D and the multipliers used to obtain
the factor	U or L as computed by ZSPTRF, stored as	a packed
triangular	matrix.

IPIV    (input) INTEGER array, dimension (N)
Details of	the interchanges and the block structure of D as
determined	by ZSPTRF.

B	     (input/output) COMPLEX*16 array, dimension	(LDB,NRHS)
On	entry, the right hand side matrix B.  On exit, the solution
matrix X.

LDB     (input) INTEGER
The leading dimension of the array	B.  LDB	>= max(1,N).

Page 1

ZSPTRS(3F)							    ZSPTRS(3F)

INFO    (output) INTEGER
= 0:  successful exit
< 0: if INFO = -i,	the i-th argument had an illegal value

PPPPaaaaggggeeee 2222```
[ Back ]
Similar pages