.TH "TESTING/LIN/sptt01.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
TESTING/LIN/sptt01.f
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBsptt01\fP (n, d, e, df, ef, work, resid)"
.br
.RI "\fBSPTT01\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine sptt01 (integer n, real, dimension( * ) d, real, dimension( * ) e, real, dimension( * ) df, real, dimension( * ) ef, real, dimension( * ) work, real resid)"

.PP
\fBSPTT01\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 SPTT01 reconstructs a tridiagonal matrix A from its L*D*L'
 factorization and computes the residual
    norm(L*D*L' - A) / ( n * norm(A) * EPS ),
 where EPS is the machine epsilon\&.
.fi
.PP
 
.RE
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\fBParameters\fP
.RS 4
\fIN\fP 
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.nf
          N is INTEGER
          The order of the matrix A\&.
.fi
.PP
.br
\fID\fP 
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.nf
          D is REAL array, dimension (N)
          The n diagonal elements of the tridiagonal matrix A\&.
.fi
.PP
.br
\fIE\fP 
.PP
.nf
          E is REAL array, dimension (N-1)
          The (n-1) subdiagonal elements of the tridiagonal matrix A\&.
.fi
.PP
.br
\fIDF\fP 
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.nf
          DF is REAL array, dimension (N)
          The n diagonal elements of the factor L from the L*D*L'
          factorization of A\&.
.fi
.PP
.br
\fIEF\fP 
.PP
.nf
          EF is REAL array, dimension (N-1)
          The (n-1) subdiagonal elements of the factor L from the
          L*D*L' factorization of A\&.
.fi
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.br
\fIWORK\fP 
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.nf
          WORK is REAL array, dimension (2*N)
.fi
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.br
\fIRESID\fP 
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.nf
          RESID is REAL
          norm(L*D*L' - A) / (n * norm(A) * EPS)
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 
.PP
Univ\&. of California Berkeley 
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Univ\&. of Colorado Denver 
.PP
NAG Ltd\&. 
.RE
.PP

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Definition at line \fB90\fP of file \fBsptt01\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.