PaStiX Handbook  6.3.2
Symbolic factorization

## Data Structures

struct  symbol_faxtlok_s
The chained column block structure. More...

## Macros

#define SYMBOL_FAX_HASHPRIME   17
Prime number for hashing vertex numbers.

## Typedefs

typedef struct symbol_faxtlok_s SymbolFaxTlok
The chained column block structure. More...

## Functions

int pastixSymbolFaxILUk (symbol_matrix_t *symbptr, pastix_int_t levelk, const pastix_graph_t *graphA, const pastix_order_t *ordeptr)
Create the symbol matrix from the graph of the non zero pattern of the factorized matrix and the supernode partition. More...

void faxCSRPatchSymbol (symbol_matrix_t *symbmtx)
Patch the symbol matrix to add blocks in order to get a real elimination tree. More...

## ◆ symbol_faxtlok_s

 struct symbol_faxtlok_s

The chained column block structure.

These blocks are chained in a single linked list for block merge with blocks of left columns.

Definition at line 34 of file symbol_fax.h.

Data Fields
pastix_int_t frownum

First row index

pastix_int_t lrownum

Last row index (inclusive)

pastix_int_t fcblknm

Facing column block

pastix_int_t nextnum

Index of next block

## ◆ SymbolFaxTlok

 typedef struct symbol_faxtlok_s SymbolFaxTlok

The chained column block structure.

These blocks are chained in a single linked list for block merge with blocks of left columns.

## ◆ pastixSymbolFaxILUk()

 int pastixSymbolFaxILUk ( symbol_matrix_t * symbptr, pastix_int_t levelk, const pastix_graph_t * graphA, const pastix_order_t * ordeptr )

Create the symbol matrix from the graph of the non zero pattern of the factorized matrix and the supernode partition.

Parameters
 [in] symbptr TODO [in] levelk TODO [in] graphA TODO [out] ordeptr TODO
Return values
 0 on success. !0 on failure.

Definition at line 51 of file symbol_fax_iluk.c.

## ◆ faxCSRPatchSymbol()

 void faxCSRPatchSymbol ( symbol_matrix_t * symbmtx )

Patch the symbol matrix to add blocks in order to get a real elimination tree.

This function is called when ILU(k) factorization is performed and the faxCSRBuildSymbol() function might have returned a symbol matrix that doesn't provide a real elimination tree.

Parameters
 [in,out] symbmtx On entry, a generated symbol matrix with faxCSRBuildSymbol() for example. On exit, the patched symbol matrix with extra blocks to have a real elimination tree.

For the cblk of the symbol matrix

Add a blok toward the father

OIMBE try lcolnum

Copy the last one

Virtual cblk

Definition at line 223 of file symbol_fax_iluk.c.