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dsdot(3) [centos man page]

dsdot.f(3)							      LAPACK								dsdot.f(3)

NAME

       dsdot.f -

SYNOPSIS

   Functions/Subroutines
       DOUBLE PRECISION function dsdot (N, SX, INCX, SY, INCY)
	   DSDOT

Function/Subroutine Documentation
   DOUBLE PRECISION function dsdot (integerN, real, dimension(*)SX, integerINCX, real, dimension(*)SY, integerINCY)
       DSDOT Purpose:

	    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.

       Parameters:
	   N

		     N is INTEGER
		    number of elements in input vector(s)

	   SX

		     SX is REAL array, dimension(N)
		    single precision vector with N elements

	   INCX

		     INCX is INTEGER
		     storage spacing between elements of SX

	   SY

		     SY is REAL array, dimension(N)
		    single precision vector with N elements

	   INCY

		     INCY is INTEGER
		    storage spacing between elements of SY

       Returns:
	   DSDOT

		     DSDOT is DOUBLE PRECISION
		    DSDOT  double precision dot product (zero if N.LE.0)

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Further Details:

       References:

	     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)

       Definition at line 120 of file dsdot.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012							dsdot.f(3)

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drotm.f(3)							      LAPACK								drotm.f(3)

NAME

       drotm.f -

SYNOPSIS

   Functions/Subroutines
       subroutine drotm (N, DX, INCX, DY, INCY, DPARAM)
	   DROTM

Function/Subroutine Documentation
   subroutine drotm (integerN, double precision, dimension(*)DX, integerINCX, double precision, dimension(*)DY, integerINCY, double precision,
       dimension(5)DPARAM)
       DROTM Purpose:

	       APPLY THE MODIFIED GIVENS TRANSFORMATION, H, TO THE 2 BY N MATRIX

	       (DX**T) , WHERE **T INDICATES TRANSPOSE. THE ELEMENTS OF DX ARE IN
	       (DY**T)

	       DX(LX+I*INCX), I = 0 TO N-1, WHERE LX = 1 IF INCX .GE. 0, ELSE
	       LX = (-INCX)*N, AND SIMILARLY FOR SY USING LY AND INCY.
	       WITH DPARAM(1)=DFLAG, H HAS ONE OF THE FOLLOWING FORMS..

	       DFLAG=-1.D0     DFLAG=0.D0	 DFLAG=1.D0	DFLAG=-2.D0

		 (DH11	DH12)	 (1.D0	DH12)	 (DH11	1.D0)	 (1.D0	0.D0)
	       H=(	    )	 (	    )	 (	    )	 (	    )
		 (DH21	DH22),	 (DH21	1.D0),	 (-1.D0 DH22),	 (0.D0	1.D0).
	       SEE DROTMG FOR A DESCRIPTION OF DATA STORAGE IN DPARAM.

       Parameters:
	   N

		     N is INTEGER
		    number of elements in input vector(s)

	   DX

		     DX is DOUBLE PRECISION array, dimension N
		    double precision vector with N elements

	   INCX

		     INCX is INTEGER
		    storage spacing between elements of DX

	   DY

		     DY is DOUBLE PRECISION array, dimension N
		    double precision vector with N elements

	   INCY

		     INCY is INTEGER
		    storage spacing between elements of DY

	   DPARAM

		     DPARAM is DOUBLE PRECISION array, dimension 5
		DPARAM(1)=DFLAG
		DPARAM(2)=DH11
		DPARAM(3)=DH21
		DPARAM(4)=DH12
		DPARAM(5)=DH22

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 99 of file drotm.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012							drotm.f(3)
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