.TH "BLAS/SRC/dsdot.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
BLAS/SRC/dsdot.f
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "double precision function \fBdsdot\fP (n, sx, incx, sy, incy)"
.br
.RI "\fBDSDOT\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "double precision function dsdot (integer n, real, dimension(*) sx, integer incx, real, dimension(*) sy, integer incy)"

.PP
\fBDSDOT\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
!>
!> Compute the inner product of two vectors with extended
!> precision accumulation and result\&.
!>
!> Returns D\&.P\&. dot product accumulated in D\&.P\&., for S\&.P\&. SX and SY
!> DSDOT = sum for I = 0 to N-1 of  SX(LX+I*INCX) * SY(LY+I*INCY),
!> where LX = 1 if INCX \&.GE\&. 0, else LX = 1+(1-N)*INCX, and LY is
!> defined in a similar way using INCY\&.
!> 
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIN\fP 
.PP
.nf
!>          N is INTEGER
!>         number of elements in input vector(s)
!> 
.fi
.PP
.br
\fISX\fP 
.PP
.nf
!>          SX is REAL array, dimension(N)
!>         single precision vector with N elements
!> 
.fi
.PP
.br
\fIINCX\fP 
.PP
.nf
!>          INCX is INTEGER
!>          storage spacing between elements of SX
!> 
.fi
.PP
.br
\fISY\fP 
.PP
.nf
!>          SY is REAL array, dimension(N)
!>         single precision vector with N elements
!> 
.fi
.PP
.br
\fIINCY\fP 
.PP
.nf
!>          INCY is INTEGER
!>         storage spacing between elements of SY
!> 
.fi
.PP
.RE
.PP
\fBReturns\fP
.RS 4
DSDOT 
.PP
.nf
!>          DSDOT is DOUBLE PRECISION
!>         DSDOT  double precision dot product (zero if N\&.LE\&.0)
!> 
.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
\fBFurther Details:\fP
.RS 4

.PP
.nf
!> 
.fi
.PP
 
.RE
.PP
\fBReferences:\fP
.RS 4

.PP
.nf
!>
!>
!>  C\&. L\&. Lawson, R\&. J\&. Hanson, D\&. R\&. Kincaid and F\&. T\&.
!>  Krogh, Basic linear algebra subprograms for Fortran
!>  usage, Algorithm No\&. 539, Transactions on Mathematical
!>  Software 5, 3 (September 1979), pp\&. 308-323\&.
!>
!>  REVISION HISTORY  (YYMMDD)
!>
!>  791001  DATE WRITTEN
!>  890831  Modified array declarations\&.  (WRB)
!>  890831  REVISION DATE from Version 3\&.2
!>  891214  Prologue converted to Version 4\&.0 format\&.  (BAB)
!>  920310  Corrected definition of LX in DESCRIPTION\&.  (WRB)
!>  920501  Reformatted the REFERENCES section\&.  (WRB)
!>  070118  Reformat to LAPACK style (JL)
!> 
.fi
.PP
 
.RE
.PP

.PP
Definition at line \fB118\fP of file \fBdsdot\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.