.TH "dstev.f" 3 "Tue Nov 14 2017" "Version 3.8.0" "LAPACK" \" -*- nroff -*-
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.SH NAME
dstev.f
.SH SYNOPSIS
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.PP
.SS "Functions/Subroutines"

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.RI "subroutine \fBdstev\fP (JOBZ, \fBN\fP, D, E, Z, LDZ, WORK, INFO)"
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.RI "\fB DSTEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices\fP "
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.SH "Function/Subroutine Documentation"
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.SS "subroutine dstev (character JOBZ, integer N, double precision, dimension( * ) D, double precision, dimension( * ) E, double precision, dimension( ldz, * ) Z, integer LDZ, double precision, dimension( * ) WORK, integer INFO)"

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\fB DSTEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices\fP  
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\fBPurpose: \fP
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.nf
 DSTEV computes all eigenvalues and, optionally, eigenvectors of a
 real symmetric tridiagonal matrix A.
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.RE
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\fBParameters:\fP
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\fIJOBZ\fP 
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          JOBZ is CHARACTER*1
          = 'N':  Compute eigenvalues only;
          = 'V':  Compute eigenvalues and eigenvectors.
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\fIN\fP 
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          N is INTEGER
          The order of the matrix.  N >= 0.
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\fID\fP 
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          D is DOUBLE PRECISION array, dimension (N)
          On entry, the n diagonal elements of the tridiagonal matrix
          A.
          On exit, if INFO = 0, the eigenvalues in ascending order.
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\fIE\fP 
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          E is DOUBLE PRECISION array, dimension (N-1)
          On entry, the (n-1) subdiagonal elements of the tridiagonal
          matrix A, stored in elements 1 to N-1 of E.
          On exit, the contents of E are destroyed.
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\fIZ\fP 
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          Z is DOUBLE PRECISION array, dimension (LDZ, N)
          If JOBZ = 'V', then if INFO = 0, Z contains the orthonormal
          eigenvectors of the matrix A, with the i-th column of Z
          holding the eigenvector associated with D(i).
          If JOBZ = 'N', then Z is not referenced.
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\fILDZ\fP 
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          LDZ is INTEGER
          The leading dimension of the array Z.  LDZ >= 1, and if
          JOBZ = 'V', LDZ >= max(1,N).
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\fIWORK\fP 
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          WORK is DOUBLE PRECISION array, dimension (max(1,2*N-2))
          If JOBZ = 'N', WORK is not referenced.
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\fIINFO\fP 
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          INFO is INTEGER
          = 0:  successful exit
          < 0:  if INFO = -i, the i-th argument had an illegal value
          > 0:  if INFO = i, the algorithm failed to converge; i
                off-diagonal elements of E did not converge to zero.
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.RE
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\fBAuthor:\fP
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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\&. 
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\fBDate:\fP
.RS 4
December 2016 
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Definition at line 118 of file dstev\&.f\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.
