s_xbt_swag_t element_set; /* a list of lmm_mat_element_t */
s_xbt_swag_t active_element_set; /* a list of lmm_mat_element_t */
double bound;
s_xbt_swag_t element_set; /* a list of lmm_mat_element_t */
s_xbt_swag_t active_element_set; /* a list of lmm_mat_element_t */
double bound;