.TH "slasq4.f" 3 "Wed Oct 15 2014" "Version 3.4.2" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
slasq4.f \- 
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBslasq4\fP (I0, N0, Z, PP, N0IN, DMIN, DMIN1, DMIN2, DN, DN1, DN2, TAU, TTYPE, G)"
.br
.RI "\fI\fBSLASQ4\fP computes an approximation to the smallest eigenvalue using values of d from the previous transform\&. Used by sbdsqr\&. \fP"
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine slasq4 (integerI0, integerN0, real, dimension( * )Z, integerPP, integerN0IN, realDMIN, realDMIN1, realDMIN2, realDN, realDN1, realDN2, realTAU, integerTTYPE, realG)"

.PP
\fBSLASQ4\fP computes an approximation to the smallest eigenvalue using values of d from the previous transform\&. Used by sbdsqr\&.  
.PP
\fBPurpose: \fP
.RS 4

.PP
.nf
 SLASQ4 computes an approximation TAU to the smallest eigenvalue
 using values of d from the previous transform.
.fi
.PP
 
.RE
.PP
\fBParameters:\fP
.RS 4
\fII0\fP 
.PP
.nf
          I0 is INTEGER
        First index.
.fi
.PP
.br
\fIN0\fP 
.PP
.nf
          N0 is INTEGER
        Last index.
.fi
.PP
.br
\fIZ\fP 
.PP
.nf
          Z is REAL array, dimension ( 4*N )
        Z holds the qd array.
.fi
.PP
.br
\fIPP\fP 
.PP
.nf
          PP is INTEGER
        PP=0 for ping, PP=1 for pong.
.fi
.PP
.br
\fIN0IN\fP 
.PP
.nf
          N0IN is INTEGER
        The value of N0 at start of EIGTEST.
.fi
.PP
.br
\fIDMIN\fP 
.PP
.nf
          DMIN is REAL
        Minimum value of d.
.fi
.PP
.br
\fIDMIN1\fP 
.PP
.nf
          DMIN1 is REAL
        Minimum value of d, excluding D( N0 ).
.fi
.PP
.br
\fIDMIN2\fP 
.PP
.nf
          DMIN2 is REAL
        Minimum value of d, excluding D( N0 ) and D( N0-1 ).
.fi
.PP
.br
\fIDN\fP 
.PP
.nf
          DN is REAL
        d(N)
.fi
.PP
.br
\fIDN1\fP 
.PP
.nf
          DN1 is REAL
        d(N-1)
.fi
.PP
.br
\fIDN2\fP 
.PP
.nf
          DN2 is REAL
        d(N-2)
.fi
.PP
.br
\fITAU\fP 
.PP
.nf
          TAU is REAL
        This is the shift.
.fi
.PP
.br
\fITTYPE\fP 
.PP
.nf
          TTYPE is INTEGER
        Shift type.
.fi
.PP
.br
\fIG\fP 
.PP
.nf
          G is REAL
        G is passed as an argument in order to save its value between
        calls to SLASQ4.
.fi
.PP
 
.RE
.PP
\fBAuthor:\fP
.RS 4
Univ\&. of Tennessee 
.PP
Univ\&. of California Berkeley 
.PP
Univ\&. of Colorado Denver 
.PP
NAG Ltd\&. 
.RE
.PP
\fBDate:\fP
.RS 4
September 2012 
.RE
.PP
\fBFurther Details: \fP
.RS 4

.PP
.nf
  CNST1 = 9/16
.fi
.PP
 
.RE
.PP

.PP
Definition at line 151 of file slasq4\&.f\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.