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GRBModel.AddGenConstrPow()

Add a new general constraint of type GRB.GENCONSTR_POW to a model.

A power function constraint states that the relationship $y = x^a$ should hold for variables $x$ and $y$ , where $a$ is the (constant) exponent. The lower bound of variable must be nonnegative, even if is an integer.

A piecewise-linear approximation of the function is added to the model. The details of the approximation are controlled using the following four attributes (or using the parameters with the same names): FuncPieces, FuncPieceError, FuncPiecesLength, and FuncPieceRatio. For details, consult the General Constraint discussion.

GRBGenConstr	AddGenConstrPow (	GRBVar	xvar,
		GRBVar	yvar,
		double	a,
		string	name,
		string	options )

Arguments:

xvar: The $x$ variable.

yvar: The $y$ variable.

a: The power of the function, $a > 0$ .

name: Name for the new general constraint.

options: A string that can be used to set the attributes that control the piecewise-linear approximation of this function constraint. To assign a value to an attribute, follow the attribute name with an equal sign and the desired value (with no spaces). Assignments for different attributes should be separated by spaces (e.g. "FuncPieces=-1 FuncPieceError=0.001").

Return value:

New general constraint.