arnoldi_vector Module Reference

operations for skinny matrices/vectors expressed in dbcsr form More...

Functions/Subroutines
subroutine, public	create_col_vec_from_matrix (dbcsr_vec, matrix, ncol)
	creates a dbcsr col vector like object which lives on proc_col 0 and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)
subroutine, public	create_row_vec_from_matrix (dbcsr_vec, matrix, nrow)
	creates a dbcsr row vector like object which lives on proc_row 0 and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)
subroutine, public	create_replicated_col_vec_from_matrix (dbcsr_vec, matrix, ncol)
	creates a col vector like object whose blocks can be replicated along the processor row and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)
subroutine, public	create_replicated_row_vec_from_matrix (dbcsr_vec, matrix, nrow)
	creates a row vector like object whose blocks can be replicated along the processor col and has the same col dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)
subroutine, public	dbcsr_matrix_colvec_multiply (matrix, vec_in, vec_out, alpha, beta, work_row, work_col)
	the real driver routine for the multiply, not all symmetries implemented yet

Detailed Description

operations for skinny matrices/vectors expressed in dbcsr form

History

2014.10 created [Florian Schiffmann] 2023.12 Removed support for single-precision [Ole Schuett] 2024.12 Removed support for complex input matrices [Ole Schuett]

Author

Florian Schiffmann

Function/Subroutine Documentation

create_col_vec_from_matrix()

subroutine, public arnoldi_vector::create_col_vec_from_matrix	(	type(dbcsr_type)	dbcsr_vec,
		type(dbcsr_type)	matrix,
		integer	ncol
	)

creates a dbcsr col vector like object which lives on proc_col 0 and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)

Parameters

dbcsr_vec	the vector object to create must be allocated but not initialized
matrix	a dbcsr matrix used as template
ncol	number of vectors in the dbcsr_typeect (1 for vector, n for skinny matrix)

Definition at line 82 of file arnoldi_vector.F.

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create_row_vec_from_matrix()

subroutine, public arnoldi_vector::create_row_vec_from_matrix	(	type(dbcsr_type)	dbcsr_vec,
		type(dbcsr_type)	matrix,
		integer	nrow
	)

creates a dbcsr row vector like object which lives on proc_row 0 and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)

Parameters

dbcsr_vec	...
matrix	a dbcsr matrix used as template
nrow	number of vectors in the dbcsr_typeect (1 for vector, n for skinny matrix)

Definition at line 122 of file arnoldi_vector.F.

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create_replicated_col_vec_from_matrix()

subroutine, public arnoldi_vector::create_replicated_col_vec_from_matrix	(	type(dbcsr_type)	dbcsr_vec,
		type(dbcsr_type)	matrix,
		integer	ncol
	)

creates a col vector like object whose blocks can be replicated along the processor row and has the same row dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)

Parameters

dbcsr_vec	the vector object to create must be allocated but not initialized
matrix	a dbcsr matrix used as template
ncol	number of vectors in the dbcsr_typeect (1 for vector, n for skinny matrix)

Definition at line 162 of file arnoldi_vector.F.

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create_replicated_row_vec_from_matrix()

subroutine, public arnoldi_vector::create_replicated_row_vec_from_matrix	(	type(dbcsr_type)	dbcsr_vec,
		type(dbcsr_type)	matrix,
		integer	nrow
	)

creates a row vector like object whose blocks can be replicated along the processor col and has the same col dist as the template matrix the returned matrix is fully allocated and all blocks are set to 0 this is not a sparse object (and must never be)

Parameters

dbcsr_vec	the vector object to create must be allocated but not initialized
matrix	a dbcsr matrix used as template
nrow	number of vectors in the dbcsr_typeect (1 for vector, n for skinny matrix)

Definition at line 204 of file arnoldi_vector.F.

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dbcsr_matrix_colvec_multiply()

subroutine, public arnoldi_vector::dbcsr_matrix_colvec_multiply	(	type(dbcsr_type)	matrix,
		type(dbcsr_type)	vec_in,
		type(dbcsr_type)	vec_out,
		real(kind=real_8)	alpha,
		real(kind=real_8)	beta,
		type(dbcsr_type)	work_row,
		type(dbcsr_type)	work_col
	)

the real driver routine for the multiply, not all symmetries implemented yet

Parameters

matrix	...
vec_in	...
vec_out	...
alpha	...
beta	...
work_row	...
work_col	...

Definition at line 530 of file arnoldi_vector.F.

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