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library(ic_gap_sbdd)

GAP-based Symmetry Breaking via Dominance Detection (SBDD)

Predicates

all_solutions(+Goal)
Find all solutions to the given goal
all_solutions(+Goal, ?NSols)
Find all solutions to the given goal
first_solution(+Goal)
Find the first solution to the given goal
is_sbdd_var(?Var)
Checks whether a variable is an SBDD variable
sbdd_indomain(?Var)
Instantiate an integer SBDD variable to an element of its domain
sbdd_initialise(+Array, ++VarDimNames, ++ValueDimSpec, +SymSpecs, +Options)
Initialises the data structures required by the SBDD algorithm
sbdd_initialise_set(+Array, ++VarDimNames, ++ValueDimSpec, +SymSpecs, +Options)
Initialises the data structures required by the SBDD algorithm (set version)
sbdd_labeling(?List)
Instantiate all integer SBDD variables in a list to elements of their domains
sbdd_record(?, ?, ?)
No description available
sbdd_recorded_indomain(?, ?, ?)
No description available
sbdd_try(+Var, ++Value)
Try assigning a value to an SBDD search variable
sbdd_try(+Var, ++Value, ?Success)
Try assigning a value to an SBDD search variable
sbdd_try_set(+Var, ++Value, ++Bool)
Try adding/excluding a value to/from an SBDD set search variable
sbdd_try_set(+Var, ++Value, ++Bool, ?Success)
Try adding/excluding a value to/from an SBDD set search variable
throttle_default(+SBDDInfo)
Default throttling predicate
throttle_depth_mod_non_unique(++DepthModulus, +SBDDInfo)
Example throttling predicate
throttle_depth_mod_unique(++DepthModulus, +SBDDInfo)
Example throttling predicate
throttle_depth_non_unique(++MaxDepth, +SBDDInfo)
Example throttling predicate
throttle_depth_unique(++MaxDepth, +SBDDInfo)
Example throttling predicate

Structures

struct sbdd_shared(array, depth, dec_info_list, dim_factors, val_offset, ground_points, throttle_pred, module)
Structure containing information for GAP-SBDD search

Description

This library provides a GAP-based Symmetry Breaking via Dominance Detection (SBDD) library, as described in:

Ian P. Gent, Warwick Harvey, Tom Kelsey and Steve Linton. "Generic SBDD using Computational Group Theory". In Francesca Rossi, editor, Proceedings of the Ninth International Conference on Principles and Practice of Constraint Programming - CP 2003, LNCS 2833, pages 333-347. Springer-Verlag, 2003.

It has been enhanced by (amongst other things) being integrated with the symmetry expression library described in:

Warwick Harvey, Tom Kelsey and Karen Petrie. "Symmetry Group Expression for CSPs." In Barbara Smith et al., editors, Proceedings of SymCon'03: Third International Workshop on Symmetry in Constraint Satisfaction Problems, a workshop of CP 2003, pages 86-96. September, 2003.

This library is still being developed and is expected to evolve. Feedback, suggestions, problem reports, etc. welcome.

Please note that this library currently does not work on Windows machines due to its dependence on the GAP interface library.

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See Also

library(sym_expr), library(gap)
Generated from ic_gap_sbdd.eci on 2017-02-24 10:06