regularity_onesum.c File Reference

#include <cmr/regular.h>
#include <assert.h>
#include <stdlib.h>
#include "env_internal.h"
#include "seymour_internal.h"
#include "sort.h"
#include "block_decomposition.h"

Functions
int	compareOneSumComponents (const void *a, const void *b)
CMR_ERROR	CMRregularitySearchOneSum (CMR *cmr, DecompositionTask *task, DecompositionQueue *queue)
	Performs a 1-sum decomposition of matrix and stores it in dec. More...

Function Documentation

CMRregularitySearchOneSum()

CMR_ERROR CMRregularitySearchOneSum	(	CMR *	cmr,
		DecompositionTask *	task,
		DecompositionQueue *	queue
	)

Performs a 1-sum decomposition of matrix and stores it in dec.

If matrix is 1-connected, then dec remains unchanged. Otherwise, dec will become a CMR_SEYMOUR_NODE_TYPE_ONE_SUM node with children that are initialized to the 1-connected components. In this case, the matrix and transpose members of the child nodes are set.

Parameters

cmr	CMR environment.
task	Task to be processed; already removed from the list of unprocessed tasks.
queue	Queue of unprocessed nodes.

compareOneSumComponents()

int compareOneSumComponents	(	const void *	a,
		const void *	b
	)