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

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.ti -1c
.RI "subroutine \fBdlarrr\fP (n, d, e, info)"
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.RI "\fBDLARRR\fP performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues\&. "
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.SH "Function/Subroutine Documentation"
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.SS "subroutine dlarrr (integer n, double precision, dimension( * ) d, double precision, dimension( * ) e, integer info)"

.PP
\fBDLARRR\fP performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues\&.  
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\fBPurpose:\fP
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.nf
!>
!> Perform tests to decide whether the symmetric tridiagonal matrix T
!> warrants expensive computations which guarantee high relative accuracy
!> in the eigenvalues\&.
!> 
.fi
.PP
 
.RE
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\fBParameters\fP
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\fIN\fP 
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!>          N is INTEGER
!>          The order of the matrix\&. N > 0\&.
!> 
.fi
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\fID\fP 
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!>          D is DOUBLE PRECISION array, dimension (N)
!>          The N diagonal elements of the tridiagonal matrix T\&.
!> 
.fi
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.br
\fIE\fP 
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.nf
!>          E is DOUBLE PRECISION array, dimension (N)
!>          On entry, the first (N-1) entries contain the subdiagonal
!>          elements of the tridiagonal matrix T; E(N) is set to ZERO\&.
!> 
.fi
.PP
.br
\fIINFO\fP 
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.nf
!>          INFO is INTEGER
!>          INFO = 0(default) : the matrix warrants computations preserving
!>                              relative accuracy\&.
!>          INFO = 1          : the matrix warrants computations guaranteeing
!>                              only absolute accuracy\&.
!> 
.fi
.PP
 
.RE
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\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
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\fBContributors:\fP
.RS 4
Beresford Parlett, University of California, Berkeley, USA 
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Jim Demmel, University of California, Berkeley, USA 
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Inderjit Dhillon, University of Texas, Austin, USA 
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Osni Marques, LBNL/NERSC, USA 
.br
Christof Voemel, University of California, Berkeley, USA 
.RE
.PP

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Definition at line \fB93\fP of file \fBdlarrr\&.f\fP\&.
.SH "Author"
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Generated automatically by Doxygen for LAPACK from the source code\&.