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DLAED6Run Method

Purpose ======= DLAED6 computes the positive or negative root (closest to the origin) of z(1) z(2) z(3) f(x) = rho + --------- + ---------- + --------- d(1)-x d(2)-x d(3)-x It is assumed that if ORGATI = .true. the root is between d(2) and d(3); otherwise it is between d(1) and d(2) This routine will be called by DLAED4 when necessary. In most cases, the root sought is the smallest in magnitude, though it might not be in some extremely rare situations.

Namespace: DotNumerics.LinearAlgebra.CSLapack
Assembly: DWSIM.MathOps.DotNumerics (in DWSIM.MathOps.DotNumerics.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
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public void Run(
	int KNITER,
	bool ORGATI,
	double RHO,
	double[] D,
	int offset_d,
	double[] Z,
	int offset_z,
	double FINIT,
	ref double TAU,
	ref int INFO
)
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Parameters

KNITER  Int32
(input) INTEGER Refer to DLAED4 for its significance.
ORGATI  Boolean
(input) LOGICAL If ORGATI is true, the needed root is between d(2) and d(3); otherwise it is between d(1) and d(2). See DLAED4 for further details.
RHO  Double
(input) DOUBLE PRECISION Refer to the equation f(x) above.
D  Double
(input) DOUBLE PRECISION array, dimension (3) D satisfies d(1) .LT. d(2) .LT. d(3).
offset_d  Int32
 
Z  Double
(input) DOUBLE PRECISION array, dimension (3) Each of the elements in z must be positive.
offset_z  Int32
 
FINIT  Double
(input) DOUBLE PRECISION The value of f at 0. It is more accurate than the one evaluated inside this routine (if someone wants to do so).
TAU  Double
(output) DOUBLE PRECISION The root of the equation f(x).
INFO  Int32
(output) INTEGER = 0: successful exit .GT. 0: if INFO = 1, failure to converge
See Also