Procedure GMP::SolverSession::GenerateBranchLowerBound(solverSession, column, bound, branch)

GMP::SolverSession::GenerateBranchLowerBound

The procedure GMP::SolverSession::GenerateBranchLowerBound specifies the lower bound change of a column in a branch to be taken from the current node during MIP branch-and-cut.

GMP::SolverSession::GenerateBranchLowerBound(
     solverSession,    ! (input) a solver session
     column,           ! (input) a scalar reference
     bound,            ! (input) a numerical expression
     branch            ! (input) a branch number
     )

Arguments

solverSession

An element in the set AllSolverSessions.

column

A scalar reference to an existing column in the model.

bound

The value assigned to the lower bound change of the column in the branch.

branch

An integer scalar reference to the branch number. It should be equal to 1 or 2.

Return Value

The procedure returns 1 on success, or 0 otherwise.

Note

  • A branch can be specified by adding multiple bound changes and rows (with GMP::SolverSession::GenerateBranchRow) to the node problem.

  • This procedure can only be called from within a CallbackBranch callback procedure.

  • A CallbackBranch callback procedure will only be called when solving mixed integer programs with CPLEX.

See also

The procedures GMP::Instance::SetCallbackBranch, GMP::SolverSession::GenerateBranchUpperBound and GMP::SolverSession::GenerateBranchRow.