# Package org.cpsolver.ifs.example.csp

Random Binary CSP with uniform distribution.

See: Description

- Class Summary
  Class | Description
  --- | ---
  CSPBinaryConstraint | CSP binary constraint.
  CSPModel | Random Binary CSP with uniform distribution.
  CSPValue | CSP value.
  CSPVariable | CSP variable.
  SimpleTest | Simple test of IFS CBS algorithm on random binary CSP problem CSP(25,12,198/300,36/144).
  StructuredCSPModel | Random Binary CSP with kernels.
  Test | Test of Structured CSP problems.

## Package org.cpsolver.ifs.example.csp Description

Random Binary CSP with uniform distribution.
A random CSP is defined by a four-tuple (n, d, p1, p2), where n denotes the number of variables and d denotes the domain size of each variable, p1 and p2 are two probabilities. They are used to generate randomly the binary constraints among the variables. p1 represents the probability that a constraint exists between two different variables and p2 represents the probability that a pair of values in the domains of two variables connected by a constraint are incompatible.
We use a so called model B of Random CSP (n, d, n1, n2) where n1 = p1*n*(n-1)/2 pairs of variables are randomly and uniformly selected and binary constraints are posted between them. For each constraint, n2 = p1*d^2 randomly and uniformly selected pairs of values are picked as incompatible.