# constraint

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**Constraint Propagation**— A parallel processing technique used to locate data by simultaneously evaluating and exclude many possibilities in an expert system decision tree. See also Expert system …72

**Complexity of constraint satisfaction**— The complexity of constraint satisfaction is the application of computational complexity theory on constraint satisfaction. It has mainly been studied for discriminating between tractable and intractable classes of constraint satisfaction… …73

**Decomposition method (constraint satisfaction)**— In constraint satisfaction, a decomposition method translates a constraint satisfaction problem into another constraint satisfaction problem that is binary and acyclic. Decomposition methods work by grouping variables into sets, and solving a… …74

**Concurrent constraint logic programming**— is a version of constraint logic programming aimed primarily at programming concurrent processes rather than (or in addition to) solving constraint satisfaction problems. Goals in constraint logic programming are evaluated concurrently; a… …75

**Distributed constraint optimization**— (DCOP or DisCOP) is the distributed analogue to constraint optimization. A DCOP is a problem in which a group of agents must distributedly choose values for a set of variables such that the cost of a set of constraints over the variables is… …76

**Check Constraint**— A check constraint (also known as table check constraint) is a condition that defines valid data when adding or updating an entry in a table of a relational database. A check constraint is applied to each row in the table. The constraint must be… …77

**First class constraint**— In Hamiltonian mechanics, consider a symplectic manifold M with a smooth Hamiltonian over it (for field theories, M would be infinite dimensional). Poisson bracketsSuppose we have some constraints : f i(x)=0, for n smooth functions :{ f i } {i=… …78

**Hybrid algorithm (constraint satisfaction)**— In constraint satisfaction, a hybrid algorithm solves a constraint satisfaction problem by the combination of two different methods, for example variable conditioning (backtracking, backjumping, etc.) and constraint inference (arc consistency,… …79

**Outrage constraint**— In corporate governance, the outrage constraint is an upper limit on executive pay.[1][2][3][4] References ^ Krugman, Paul (2002 08 23) …80

**Local search (constraint satisfaction)**— In constraint satisfaction, local search is an incomplete method for finding a solution to a problem. It is based on iteratively improving an assignment of the variables until all constraints are satisfied. In particular, local search algorithms… …