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- Exact_cover abstract "In mathematics, given a collection of subsets of a set X, an exact cover is a subcollection of such that each element in X is contained in exactly one subset in .One says that each element in X is covered by exactly one subset in .An exact cover is a kind of cover.In computer science, the exact cover problem is a decision problem to find an exact cover or else determine none exists.The exact cover problem is NP-completeand is one of Karp's 21 NP-complete problems.The exact cover problem is a kind of constraint satisfaction problem.An exact cover problem can be represented by an incidence matrix or a bipartite graph.Knuth's Algorithm X is an algorithm that finds all solutions to an exact cover problem. Dancing Links, commonly known as DLX, is the technique suggested by Donald Knuth to efficiently implement his Algorithm X on a computer.The standard exact cover problem can be generalized slightly to involve not only "exactly one" constraints but also "at-most-one" constraints.Finding Pentomino tilings and solving Sudoku are noteworthy examples of exact cover problems.The N queens problem is a slightly generalized exact cover problem.".
- Exact_cover wikiPageExternalLink srcview.aspx?dir=Sudoku&file=ExactCover.cs.
- Exact_cover wikiPageExternalLink lan-cx-np,excov.html.
- Exact_cover wikiPageExternalLink exactcovermatrix.htm.
- Exact_cover wikiPageExternalLink pentomino.
- Exact_cover wikiPageID "2828651".
- Exact_cover wikiPageRevisionID "603912667".
- Exact_cover hasPhotoCollection Exact_cover.
- Exact_cover subject Category:NP-complete_problems.
- Exact_cover subject Category:Theoretical_computer_science.
- Exact_cover type Abstraction100002137.
- Exact_cover type Attribute100024264.
- Exact_cover type Condition113920835.
- Exact_cover type Difficulty114408086.
- Exact_cover type NP-completeProblems.
- Exact_cover type Problem114410605.
- Exact_cover type State100024720.
- Exact_cover comment "In mathematics, given a collection of subsets of a set X, an exact cover is a subcollection of such that each element in X is contained in exactly one subset in .One says that each element in X is covered by exactly one subset in .An exact cover is a kind of cover.In computer science, the exact cover problem is a decision problem to find an exact cover or else determine none exists.The exact cover problem is NP-completeand is one of Karp's 21 NP-complete problems.The exact cover problem is a kind of constraint satisfaction problem.An exact cover problem can be represented by an incidence matrix or a bipartite graph.Knuth's Algorithm X is an algorithm that finds all solutions to an exact cover problem. ".
- Exact_cover label "Exact cover".
- Exact_cover label "Exacte overdekking".
- Exact_cover label "Problem der exakten Überdeckung".
- Exact_cover label "Problème de la couverture exacte".
- Exact_cover label "精确覆盖问题".
- Exact_cover sameAs Problem_der_exakten_Überdeckung.
- Exact_cover sameAs Problème_de_la_couverture_exacte.
- Exact_cover sameAs Exacte_overdekking.
- Exact_cover sameAs m.0859ts.
- Exact_cover sameAs Q388260.
- Exact_cover sameAs Q388260.
- Exact_cover sameAs Exact_cover.
- Exact_cover wasDerivedFrom Exact_cover?oldid=603912667.
- Exact_cover isPrimaryTopicOf Exact_cover.