debian man page for dlasy2

dlasy2.f(3)							      LAPACK							       dlasy2.f(3)

NAME
       dlasy2.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dlasy2 (LTRANL, LTRANR, ISGN, N1, N2, TL, LDTL, TR, LDTR, B, LDB, SCALE, X, LDX, XNORM, INFO)
	   DLASY2

Function/Subroutine Documentation
   subroutine dlasy2 (logicalLTRANL, logicalLTRANR, integerISGN, integerN1, integerN2, double precision, dimension( ldtl, * )TL, integerLDTL,
       double precision, dimension( ldtr, * )TR, integerLDTR, double precision, dimension( ldb, * )B, integerLDB, double precisionSCALE, double
       precision, dimension( ldx, * )X, integerLDX, double precisionXNORM, integerINFO)
       DLASY2

       Purpose:

	    DLASY2 solves for the N1 by N2 matrix X, 1 <= N1,N2 <= 2, in

		   op(TL)*X + ISGN*X*op(TR) = SCALE*B,

	    where TL is N1 by N1, TR is N2 by N2, B is N1 by N2, and ISGN = 1 or
	    -1.  op(T) = T or T**T, where T**T denotes the transpose of T.

       Parameters:
	   LTRANL

		     LTRANL is LOGICAL
		     On entry, LTRANL specifies the op(TL):
			= .FALSE., op(TL) = TL,
			= .TRUE., op(TL) = TL**T.

	   LTRANR

		     LTRANR is LOGICAL
		     On entry, LTRANR specifies the op(TR):
		       = .FALSE., op(TR) = TR,
		       = .TRUE., op(TR) = TR**T.

	   ISGN

		     ISGN is INTEGER
		     On entry, ISGN specifies the sign of the equation
		     as described before. ISGN may only be 1 or -1.

	   N1

		     N1 is INTEGER
		     On entry, N1 specifies the order of matrix TL.
		     N1 may only be 0, 1 or 2.

	   N2

		     N2 is INTEGER
		     On entry, N2 specifies the order of matrix TR.
		     N2 may only be 0, 1 or 2.

	   TL

		     TL is DOUBLE PRECISION array, dimension (LDTL,2)
		     On entry, TL contains an N1 by N1 matrix.

	   LDTL

		     LDTL is INTEGER
		     The leading dimension of the matrix TL. LDTL >= max(1,N1).

	   TR

		     TR is DOUBLE PRECISION array, dimension (LDTR,2)
		     On entry, TR contains an N2 by N2 matrix.

	   LDTR

		     LDTR is INTEGER
		     The leading dimension of the matrix TR. LDTR >= max(1,N2).

	   B

		     B is DOUBLE PRECISION array, dimension (LDB,2)
		     On entry, the N1 by N2 matrix B contains the right-hand
		     side of the equation.

	   LDB

		     LDB is INTEGER
		     The leading dimension of the matrix B. LDB >= max(1,N1).

	   SCALE

		     SCALE is DOUBLE PRECISION
		     On exit, SCALE contains the scale factor. SCALE is chosen
		     less than or equal to 1 to prevent the solution overflowing.

	   X

		     X is DOUBLE PRECISION array, dimension (LDX,2)
		     On exit, X contains the N1 by N2 solution.

	   LDX

		     LDX is INTEGER
		     The leading dimension of the matrix X. LDX >= max(1,N1).

	   XNORM

		     XNORM is DOUBLE PRECISION
		     On exit, XNORM is the infinity-norm of the solution.

	   INFO

		     INFO is INTEGER
		     On exit, INFO is set to
			0: successful exit.
			1: TL and TR have too close eigenvalues, so TL or
			   TR is perturbed to get a nonsingular equation.
		     NOTE: In the interests of speed, this routine does not
			   check the inputs for errors.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 174 of file dlasy2.f.

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

Version 3.4.1							  Sun May 26 2013						       dlasy2.f(3)