user_check_cut

[cf]user_check_cut

int user_check_cut(void *user, double lpetol, int varnum, 
                   int *indices, double *values, cut_data *cut,
                   int *is_violated, double *quality)

Description:

The user has to determine whether a given cut is violated by the given LP solution (see Section 6.3.2 for a description of the cut_data data data structure). Also, the user can assign a number to the cut called the quality. This number is used in deciding which cuts to check and purge. See the section on Cut Pool Parameters for more information.

Arguments:

void *user	INOUT	The user defined part of p.
double lpetol	IN	The $\epsilon$ tolerance in the LP module.
int varnum	IN	Same as the previous function.
int *indices	IN	Same as the previous function.
double *values	IN	Same as the previous function.
cut_data *cut	IN	Pointer to the cut to be tested.
int *is_violated	OUT	TRUE/FALSE based on whether the cut is violated or not.
double *quality	OUT	a number representing the relative strength of the cut.

Return values:

USER_ERROR	Cut is not sent to the LP, regardless of the value of *is_violated.
USER_SUCCESS	The user function exited properly.
USER_DEFAULT	Same as error.

Invoked from:

Whenever a cut needs to be checked.

Note:

The same note applies to number, indices and values as in the previous function.