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DLANV2Run Method

Purpose ======= DLANV2 computes the Schur factorization of a real 2-by-2 nonsymmetric matrix in standard form: [ A B ] = [ CS -SN ] [ AA BB ] [ CS SN ] [ C D ] [ SN CS ] [ CC DD ] [-SN CS ] where either 1) CC = 0 so that AA and DD are real eigenvalues of the matrix, or 2) AA = DD and BB*CC .LT. 0, so that AA + or - sqrt(BB*CC) are complex conjugate eigenvalues.

Namespace: DotNumerics.LinearAlgebra.CSLapack
Assembly: DWSIM.MathOps.DotNumerics (in DWSIM.MathOps.DotNumerics.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
Copy
public void Run(
	ref double A,
	ref double B,
	ref double C,
	ref double D,
	ref double RT1R,
	ref double RT1I,
	ref double RT2R,
	ref double RT2I,
	ref double CS,
	ref double SN
)
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Parameters

A  Double
(input/output) DOUBLE PRECISION
B  Double
(input/output) DOUBLE PRECISION
C  Double
(input/output) DOUBLE PRECISION
D  Double
(input/output) DOUBLE PRECISION On entry, the elements of the input matrix. On exit, they are overwritten by the elements of the standardised Schur form.
RT1R  Double
(output) DOUBLE PRECISION
RT1I  Double
(output) DOUBLE PRECISION
RT2R  Double
(output) DOUBLE PRECISION
RT2I  Double
(output) DOUBLE PRECISION The real and imaginary parts of the eigenvalues. If the eigenvalues are a complex conjugate pair, RT1I .GT. 0.
CS  Double
(output) DOUBLE PRECISION
SN  Double
(output) DOUBLE PRECISION Parameters of the rotation matrix.
See Also