slasq4 man page on IRIX

slasq4 man page on IRIX

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SLASQ4(3F)							    SLASQ4(3F)

NAME
     SLASQ4 - SLASQ4 estimates TAU, the smallest eigenvalue of a matrix

SYNOPSIS
     SUBROUTINE SLASQ4( N, Q, E, TAU, SUP )

	 INTEGER	N

	 REAL		SUP, TAU

	 REAL		E( * ), Q( * )

PURPOSE
	SLASQ4 estimates TAU, the smallest eigenvalue of a matrix. This
	routine improves the input value of SUP which is an upper bound
	for the smallest eigenvalue for this matrix .

ARGUMENTS
     N	     (input) INTEGER
	     On entry, N specifies the number of rows and columns in the
	     matrix. N must be at least 0.

     Q	     (input) REAL array, dimension (N)
	     Q array

     E	     (input) REAL array, dimension (N)
	     E array

     TAU     (output) REAL
	     Estimate of the shift

     SUP     (input/output) REAL
	     Upper bound for the smallest singular value

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