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RedHat 9 (Linux i386) - man page for dlasq6 (redhat section l)

DLASQ6(l)						  )						    DLASQ6(l)

NAME
DLASQ6 - compute one dqd (shift equal to zero) transform in ping-pong form, with protection against underflow and overflow
SYNOPSIS
SUBROUTINE DLASQ6( I0, N0, Z, PP, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2 ) INTEGER I0, N0, PP DOUBLE PRECISION DMIN, DMIN1, DMIN2, DN, DNM1, DNM2 DOUBLE PRECISION Z( * )
PURPOSE
DLASQ6 computes one dqd (shift equal to zero) transform in ping-pong form, with protection against underflow and overflow.
ARGUMENTS
I0 (input) INTEGER First index. N0 (input) INTEGER Last index. Z (input) DOUBLE PRECISION array, dimension ( 4*N ) Z holds the qd array. EMIN is stored in Z(4*N0) to avoid an extra argument. PP (input) INTEGER PP=0 for ping, PP=1 for pong. DMIN (output) DOUBLE PRECISION Minimum value of d. DMIN1 (output) DOUBLE PRECISION Minimum value of d, excluding D( N0 ). DMIN2 (output) DOUBLE PRECISION Minimum value of d, excluding D( N0 ) and D( N0-1 ). DN (output) DOUBLE PRECISION d(N0), the last value of d. DNM1 (output) DOUBLE PRECISION d(N0-1). DNM2 (output) DOUBLE PRECISION d(N0-2). LAPACK version 3.0 15 June 2000 DLASQ6(l)


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