1SLASQ4(1)LAPACK routine (version 3.2)                                 SLASQ4(1)
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NAME

6       SLASQ4 - computes an approximation TAU to the smallest eigenvalue using
7       values of d from the previous transform
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SYNOPSIS

10       SUBROUTINE SLASQ4( I0, N0, Z, PP, N0IN, DMIN, DMIN1,  DMIN2,  DN,  DN1,
11                          DN2, TAU, TTYPE, G )
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13           INTEGER        I0, N0, N0IN, PP, TTYPE
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15           REAL           DMIN, DMIN1, DMIN2, DN, DN1, DN2, G, TAU
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17           REAL           Z( * )
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PURPOSE

20       SLASQ4  computes  an approximation TAU to the smallest eigenvalue using
21       values of d from the previous transform.  I0    (input) INTEGER
22             First index.
23       N0    (input) INTEGER
24             Last index.
25       Z     (input) REAL array, dimension ( 4*N )
26             Z holds the qd array.
27       PP    (input) INTEGER
28             PP=0 for ping, PP=1 for pong.
29       NOIN  (input) INTEGER
30             The value of N0 at start of EIGTEST.
31       DMIN  (input) REAL
32             Minimum value of d.
33       DMIN1 (input) REAL
34             Minimum value of d, excluding D( N0 ).
35       DMIN2 (input) REAL
36             Minimum value of d,  excluding  D(  N0  )  and  D(  N0-1  ).   DN
37       (input) REAL
38             d(N)
39       DN1   (input) REAL
40             d(N-1)
41       DN2   (input) REAL
42             d(N-2)
43       TAU   (output) REAL
44             This is the shift.
45       TTYPE (output) INTEGER
46             Shift type.
47       G     (input/output) REAL
48             G is passed as an argument in order to save its value between
49             calls to SLASQ4.
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FURTHER DETAILS

52 LAPACK routine (version 3.2)    November 2008                       SLASQ4(1)