.TH "SRC/zptts2.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
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.SH NAME
SRC/zptts2.f
.SH SYNOPSIS
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.PP
.SS "Functions/Subroutines"

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.ti -1c
.RI "subroutine \fBzptts2\fP (iuplo, n, nrhs, d, e, b, ldb)"
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.RI "\fBZPTTS2\fP solves a tridiagonal system of the form AX=B using the L D LH factorization computed by spttrf\&. "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine zptts2 (integer iuplo, integer n, integer nrhs, double precision, dimension( * ) d, complex*16, dimension( * ) e, complex*16, dimension( ldb, * ) b, integer ldb)"

.PP
\fBZPTTS2\fP solves a tridiagonal system of the form AX=B using the L D LH factorization computed by spttrf\&.  
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\fBPurpose:\fP
.RS 4

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.nf
 ZPTTS2 solves a tridiagonal system of the form
    A * X = B
 using the factorization A = U**H *D*U or A = L*D*L**H computed by ZPTTRF\&.
 D is a diagonal matrix specified in the vector D, U (or L) is a unit
 bidiagonal matrix whose superdiagonal (subdiagonal) is specified in
 the vector E, and X and B are N by NRHS matrices\&.
.fi
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.RE
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\fBParameters\fP
.RS 4
\fIIUPLO\fP 
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.nf
          IUPLO is INTEGER
          Specifies the form of the factorization and whether the
          vector E is the superdiagonal of the upper bidiagonal factor
          U or the subdiagonal of the lower bidiagonal factor L\&.
          = 1:  A = U**H *D*U, E is the superdiagonal of U
          = 0:  A = L*D*L**H, E is the subdiagonal of L
.fi
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\fIN\fP 
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          N is INTEGER
          The order of the tridiagonal matrix A\&.  N >= 0\&.
.fi
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\fINRHS\fP 
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          NRHS is INTEGER
          The number of right hand sides, i\&.e\&., the number of columns
          of the matrix B\&.  NRHS >= 0\&.
.fi
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\fID\fP 
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.nf
          D is DOUBLE PRECISION array, dimension (N)
          The n diagonal elements of the diagonal matrix D from the
          factorization A = U**H *D*U or A = L*D*L**H\&.
.fi
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\fIE\fP 
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          E is COMPLEX*16 array, dimension (N-1)
          If IUPLO = 1, the (n-1) superdiagonal elements of the unit
          bidiagonal factor U from the factorization A = U**H*D*U\&.
          If IUPLO = 0, the (n-1) subdiagonal elements of the unit
          bidiagonal factor L from the factorization A = L*D*L**H\&.
.fi
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\fIB\fP 
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          B is COMPLEX*16 array, dimension (LDB,NRHS)
          On entry, the right hand side vectors B for the system of
          linear equations\&.
          On exit, the solution vectors, X\&.
.fi
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\fILDB\fP 
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.nf
          LDB is INTEGER
          The leading dimension of the array B\&.  LDB >= max(1,N)\&.
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 
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Univ\&. of California Berkeley 
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Univ\&. of Colorado Denver 
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NAG Ltd\&. 
.RE
.PP

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Definition at line \fB112\fP of file \fBzptts2\&.f\fP\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.