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man pages->IRIX man pages -> complib/ELMHES (3)
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### Contents

```
_ELMHES(3F)							   _ELMHES(3F)

```

### NAME[Toc][Back]

```     elmhes, selmhes  -	 EISPACK routine.  Given a REAL	GENERAL	matrix,	this
subroutine	reduces	a submatrix situated in	rows and columns LOW through
IGH to upper Hessenberg form by stabilized	elementary similarity
transformations.

```

### SYNOPSYS[Toc][Back]

```	  subroutine  elmhes(nm, n, low, igh, a, int)
integer	   nm, n, low, igh, int(igh)
double precision a(nm,n)

subroutine selmhes(nm, n, low, igh, a, int)
integer	   nm, n, low, igh, int(igh)
real		   a(nm,n)

```

### DESCRIPTION[Toc][Back]

```     On	INPUT

NM	must be	set to the row dimension of two-dimensional array parameters
as	declared in the	calling	program	dimension statement.

N is the order of the matrix.

LOW and IGH are integers determined by the	balancing subroutine  BALANC.
If	 BALANC	 has not been used, set	LOW=1, IGH=N.

A contains	the input matrix. On OUTPUT

A contains	the Hessenberg matrix.	The multipliers	which were used	in the
reduction are stored in the remaining triangle under the Hessenberg
matrix.

INT contains information on the rows and columns interchanged in the
reduction.	 Only elements LOW through IGH are used.  Questions and
comments should be	directed to B. S. Garbow, APPLIED MATHEMATICS
DIVISION, ARGONNE NATIONAL	LABORATORY
_ELMHES(3F)							   _ELMHES(3F)

```

### NAME[Toc][Back]

```     elmhes, selmhes  -	 EISPACK routine.  Given a REAL	GENERAL	matrix,	this
subroutine	reduces	a submatrix situated in	rows and columns LOW through
IGH to upper Hessenberg form by stabilized	elementary similarity
transformations.

```

### SYNOPSYS[Toc][Back]

```	  subroutine  elmhes(nm, n, low, igh, a, int)
integer	   nm, n, low, igh, int(igh)
double precision a(nm,n)

subroutine selmhes(nm, n, low, igh, a, int)
integer	   nm, n, low, igh, int(igh)
real		   a(nm,n)

```

### DESCRIPTION[Toc][Back]

```     On	INPUT

NM	must be	set to the row dimension of two-dimensional array parameters
as	declared in the	calling	program	dimension statement.

N is the order of the matrix.

LOW and IGH are integers determined by the	balancing subroutine  BALANC.
If	 BALANC	 has not been used, set	LOW=1, IGH=N.

A contains	the input matrix. On OUTPUT

A contains	the Hessenberg matrix.	The multipliers	which were used	in the
reduction are stored in the remaining triangle under the Hessenberg
matrix.

INT contains information on the rows and columns interchanged in the
reduction.	 Only elements LOW through IGH are used.  Questions and
comments should be	directed to B. S. Garbow, APPLIED MATHEMATICS
DIVISION, ARGONNE NATIONAL	LABORATORY

PPPPaaaaggggeeee 1111```
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