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cp_get_linrelax

Purpose
Returns an automatic relaxation of the cp problem
Synopsis
function cp_get_linrelax(orientation: integer) : cplinrelax
function cp_get_linrelax(orientation: integer,constraints: set of integer) : cplinrelax
Arguments
orientation 
0 for an 'LP oriented' relaxation (convex hull) and 1 for a 'MIP oriented' relaxation (can be an exact representation of the underlying CP problem)
constraints 
the set of constraints types to relax ( KALIS_LINEAR_CONSTRAINTS, KALIS_LOGICAL_CONSTRAINTS, KALIS_DISTANCE_CONSTRAINTS, KALIS_NON_LINEAR_CONSTRAINTS, KALIS_ALL_CONSTRAINTS)
Return value
A linear relaxation
Example
The following example shows how to obtain a 'MIP oriented' relaxation by relaxing only the linear part of the problem and the logical constraints. 
relax := cp_get_linrelax(1,{KALIS_LINEAR_CONSTRAINTS,
                            KALIS_LOGICAL_CONSTRAINTS})
Related topics
get_linrelax_solver cp_add_linrelax_solver

Parent Topic Linear relaxations

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