rpl/lapack/lapack/dlatdf.f - diff

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version 1.19, 2018/05/29 07:18:01	version 1.20, 2020/05/21 21:46:01
Line 85	Line 85
*> RHS is DOUBLE PRECISION array, dimension (N)	*> RHS is DOUBLE PRECISION array, dimension (N)
*> On entry, RHS contains contributions from other subsystems.	*> On entry, RHS contains contributions from other subsystems.
*> On exit, RHS contains the solution of the subsystem with	*> On exit, RHS contains the solution of the subsystem with
*> entries acoording to the value of IJOB (see above).	*> entries according to the value of IJOB (see above).
*> \endverbatim	*> \endverbatim
*>	*>
*> \param[in,out] RDSUM	*> \param[in,out] RDSUM
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*	*
* Solve for U-part, look-ahead for RHS(N) = +-1. This is not done	* Solve for U-part, look-ahead for RHS(N) = +-1. This is not done
* in BSOLVE and will hopefully give us a better estimate because	* in BSOLVE and will hopefully give us a better estimate because
* any ill-conditioning of the original matrix is transfered to U	* any ill-conditioning of the original matrix is transferred to U
* and not to L. U(N, N) is an approximation to sigma_min(LU).	* and not to L. U(N, N) is an approximation to sigma_min(LU).
*	*
CALL DCOPY( N-1, RHS, 1, XP, 1 )	CALL DCOPY( N-1, RHS, 1, XP, 1 )