cp_cfm_cholesky Module Reference

various cholesky decomposition related routines More...

Functions/Subroutines
subroutine, public	cp_cfm_cholesky_decompose (matrix, n, info_out)
	Used to replace a symmetric positive definite matrix M with its Cholesky decomposition U: M = U^T * U, with U upper triangular.
subroutine, public	cp_cfm_cholesky_invert (matrix, n, info_out)
	Used to replace Cholesky decomposition by the inverse.

Detailed Description

various cholesky decomposition related routines

History

12.2002 Moved routines from cp_cfm_basic_linalg to this new module [Rocco Meli]

Function/Subroutine Documentation

cp_cfm_cholesky_decompose()

subroutine, public cp_cfm_cholesky::cp_cfm_cholesky_decompose	(	type(cp_cfm_type), intent(in)	matrix,
		integer, intent(in), optional	n,
		integer, intent(out), optional	info_out
	)

Used to replace a symmetric positive definite matrix M with its Cholesky decomposition U: M = U^T * U, with U upper triangular.

Parameters

matrix	the matrix to replace with its Cholesky decomposition
n	the number of row (and columns) of the matrix & (defaults to the min(size(matrix)))
info_out	if present, outputs info from (p)zpotrf

History

05.2002 created [JVdV] 12.2002 updated, added n optional parm [fawzi] 09.2021 removed CPASSERT(info == 0) since there is already check of info [Jan Wilhelm] 12.2024 Added DLA-Future support [Rocco Meli] 03.2025 Moved DLA-Future support to cp_cfm_cholesky_decompose_dlaf [Rocco Meli]

Author

Joost

Definition at line 52 of file cp_cfm_cholesky.F.

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cp_cfm_cholesky_invert()

subroutine, public cp_cfm_cholesky::cp_cfm_cholesky_invert	(	type(cp_cfm_type), intent(in)	matrix,
		integer, intent(in), optional	n,
		integer, intent(out), optional	info_out
	)

Used to replace Cholesky decomposition by the inverse.

Parameters

matrix	: the matrix to invert (must be an upper triangular matrix), and is the output of Cholesky decomposition
n	: size of the matrix to invert (defaults to the min(size(matrix)))
info_out	: if present, outputs info of (p)zpotri

History

05.2002 created Lianheng Tong, based on cp_fm_cholesky_invert

Author

Lianheng Tong

Definition at line 123 of file cp_cfm_cholesky.F.

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