dsterf.f - Online Linux Manual PageSection : 3
Updated : Tue Nov 14 2017
Source : Version 3.8.0
Note : LAPACK

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NAMEdsterf.f

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SYNOPSIS

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Functions/Subroutinessubroutine dsterf (N, D, E, INFO)
DSTERF

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Function/Subroutine Documentation

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subroutine dsterf (integer N, double precision, dimension( * ) D, double precision, dimension( * ) E, integer INFO)DSTERF Purpose: DSTERF computes all eigenvalues of a symmetric tridiagonal matrix using the Pal-Walker-Kahan variant of the QL or QR algorithm.Parameters: N N is INTEGER The order of the matrix. N >= 0.
D D is DOUBLE PRECISION array, dimension (N) On entry, the n diagonal elements of the tridiagonal matrix. On exit, if INFO = 0, the eigenvalues in ascending order.
E E is DOUBLE PRECISION array, dimension (N-1) On entry, the (n-1) subdiagonal elements of the tridiagonal matrix. On exit, E has been destroyed.
INFO INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value > 0: the algorithm failed to find all of the eigenvalues in a total of 30*N iterations; if INFO = i, then i elements of E have not converged to zero.Author: Univ​. of Tennessee Univ​. of California Berkeley Univ​. of Colorado Denver NAG Ltd​. Date: December 2016 Definition at line 88 of file dsterf​.f​.

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AuthorGenerated automatically by Doxygen for LAPACK from the source code​. 0

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Johanes Gumabo

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