.TH "BLAS/SRC/stpsv.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
BLAS/SRC/stpsv.f
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBstpsv\fP (uplo, trans, diag, n, ap, x, incx)"
.br
.RI "\fBSTPSV\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine stpsv (character uplo, character trans, character diag, integer n, real, dimension(*) ap, real, dimension(*) x, integer incx)"

.PP
\fBSTPSV\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
!>
!> STPSV  solves one of the systems of equations
!>
!>    A*x = b,   or   A**T*x = b,
!>
!> where b and x are n element vectors and A is an n by n unit, or
!> non-unit, upper or lower triangular matrix, supplied in packed form\&.
!>
!> No test for singularity or near-singularity is included in this
!> routine\&. Such tests must be performed before calling this routine\&.
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIUPLO\fP 
.PP
.nf
!>          UPLO is CHARACTER*1
!>           On entry, UPLO specifies whether the matrix is an upper or
!>           lower triangular matrix as follows:
!>
!>              UPLO = 'U' or 'u'   A is an upper triangular matrix\&.
!>
!>              UPLO = 'L' or 'l'   A is a lower triangular matrix\&.
!> 
.fi
.PP
.br
\fITRANS\fP 
.PP
.nf
!>          TRANS is CHARACTER*1
!>           On entry, TRANS specifies the equations to be solved as
!>           follows:
!>
!>              TRANS = 'N' or 'n'   A*x = b\&.
!>
!>              TRANS = 'T' or 't'   A**T*x = b\&.
!>
!>              TRANS = 'C' or 'c'   A**T*x = b\&.
!> 
.fi
.PP
.br
\fIDIAG\fP 
.PP
.nf
!>          DIAG is CHARACTER*1
!>           On entry, DIAG specifies whether or not A is unit
!>           triangular as follows:
!>
!>              DIAG = 'U' or 'u'   A is assumed to be unit triangular\&.
!>
!>              DIAG = 'N' or 'n'   A is not assumed to be unit
!>                                  triangular\&.
!> 
.fi
.PP
.br
\fIN\fP 
.PP
.nf
!>          N is INTEGER
!>           On entry, N specifies the order of the matrix A\&.
!>           N must be at least zero\&.
!> 
.fi
.PP
.br
\fIAP\fP 
.PP
.nf
!>          AP is REAL array, dimension at least
!>           ( ( n*( n + 1 ) )/2 )\&.
!>           Before entry with  UPLO = 'U' or 'u', the array AP must
!>           contain the upper triangular matrix packed sequentially,
!>           column by column, so that AP( 1 ) contains a( 1, 1 ),
!>           AP( 2 ) and AP( 3 ) contain a( 1, 2 ) and a( 2, 2 )
!>           respectively, and so on\&.
!>           Before entry with UPLO = 'L' or 'l', the array AP must
!>           contain the lower triangular matrix packed sequentially,
!>           column by column, so that AP( 1 ) contains a( 1, 1 ),
!>           AP( 2 ) and AP( 3 ) contain a( 2, 1 ) and a( 3, 1 )
!>           respectively, and so on\&.
!>           Note that when  DIAG = 'U' or 'u', the diagonal elements of
!>           A are not referenced, but are assumed to be unity\&.
!> 
.fi
.PP
.br
\fIX\fP 
.PP
.nf
!>          X is REAL array, dimension at least
!>           ( 1 + ( n - 1 )*abs( INCX ) )\&.
!>           Before entry, the incremented array X must contain the n
!>           element right-hand side vector b\&. On exit, X is overwritten
!>           with the solution vector x\&.
!> 
.fi
.PP
.br
\fIINCX\fP 
.PP
.nf
!>          INCX is INTEGER
!>           On entry, INCX specifies the increment for the elements of
!>           X\&. INCX must not be zero\&.
!> 
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 

.PP
Univ\&. of California Berkeley 

.PP
Univ\&. of Colorado Denver 

.PP
NAG Ltd\&. 
.RE
.PP
\fBFurther Details:\fP
.RS 4

.PP
.nf
!>
!>  Level 2 Blas routine\&.
!>
!>  -- Written on 22-October-1986\&.
!>     Jack Dongarra, Argonne National Lab\&.
!>     Jeremy Du Croz, Nag Central Office\&.
!>     Sven Hammarling, Nag Central Office\&.
!>     Richard Hanson, Sandia National Labs\&.
!> 
.fi
.PP
 
.RE
.PP

.PP
Definition at line \fB143\fP of file \fBstpsv\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.