Remove a quadratic term from a quadratic expression.
|void||Remove (||int||i )|
Remove the quadratic term stored at index i of the expression.
i: The index of the quadratic term to be removed.
|boolean||Remove (||GRBVar||var )|
Remove all quadratic terms associated with variable var from the expression.
var: The variable whose quadratic term should be removed.
Returns true if the variable appeared in the quadratic expression (and was removed).