la_lapack::laed4 Interface Reference

This subroutine computes the I-th updated eigenvalue of a symmetric rank-one modification to a diagonal matrix whose elements are given in the array d, and that D(i) < D(j) for i < j and that RHO > 0. This is arranged by the calling routine, and is no loss in generality. The rank-one modified system is thus diag( D ) + RHO * Z * Z_transpose. where we assume the Euclidean norm of Z is 1. The method consists of approximating the rational functions in the secular equation by simpler interpolating rational functions. More...

Public Member Functions
	la_dlaed4
	la_qlaed4
	la_slaed4

Detailed Description

This subroutine computes the I-th updated eigenvalue of a symmetric rank-one modification to a diagonal matrix whose elements are given in the array d, and that D(i) < D(j) for i < j and that RHO > 0. This is arranged by the calling routine, and is no loss in generality. The rank-one modified system is thus diag( D ) + RHO * Z * Z_transpose. where we assume the Euclidean norm of Z is 1. The method consists of approximating the rational functions in the secular equation by simpler interpolating rational functions.

Member Function/Subroutine Documentation

la_dlaed4()

la_lapack::laed4::la_dlaed4

la_qlaed4()

la_lapack::laed4::la_qlaed4

la_slaed4()

la_lapack::laed4::la_slaed4

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The documentation for this interface was generated from the following file:

• la_lapack.F90