1SLASQ6(1)LAPACK routine (version 3.2)                                 SLASQ6(1)
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NAME

6       SLASQ6  - computes one dqd (shift equal to zero) transform in ping-pong
7       form, with protection against underflow and overflow
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SYNOPSIS

10       SUBROUTINE SLASQ6( I0, N0, Z, PP, DMIN, DMIN1, DMIN2, DN, DNM1, DNM2 )
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12           INTEGER        I0, N0, PP
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14           REAL           DMIN, DMIN1, DMIN2, DN, DNM1, DNM2
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16           REAL           Z( * )
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PURPOSE

19       SLASQ6 computes one dqd (shift equal to zero)  transform  in  ping-pong
20       form, with protection against underflow and overflow.
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ARGUMENTS

23       I0    (input) INTEGER
24             First index.
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26       N0    (input) INTEGER
27             Last index.
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29       Z     (input) REAL array, dimension ( 4*N )
30             Z holds the qd array. EMIN is stored in Z(4*N0) to avoid an extra
31             argument.
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33       PP    (input) INTEGER
34             PP=0 for ping, PP=1 for pong.
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36       DMIN  (output) REAL
37             Minimum value of d.  DMIN1 (output)  REAL  Minimum  value  of  d,
38             excluding  D(  N0  ).   DMIN2  (output)  REAL Minimum value of d,
39             excluding D( N0 ) and D( N0-1 ).
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41       DN    (output) REAL
42             d(N0), the last value of d.
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44       DNM1  (output) REAL
45             d(N0-1).
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47       DNM2  (output) REAL
48             d(N0-2).
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52 LAPACK routine (version 3.2)    November 2008                       SLASQ6(1)