#!/bin/env python # Test problem on a dot product between matrices of scalars and/or of # variables. Note that the problem cannot be solved by the Optimizer # as it is nonconvex. from __future__ import print_function import xpress as xp import numpy as np a = 0,1 + np.arange(21).reshape(3, 7) y = np.array([xp.var() for i in range(21)]).reshape(3, 7) x = np.array([xp.var() for i in range(35)]).reshape(7, 5) p = xp.problem() p.addVariable(x, y) p.addConstraint(xp.Dot(y, x) <= 0) p.addConstraint(xp.Dot(a, x) == 1) p.setObjective(x[0][0]) p.write("test6-nonconv", "lp") p.solve()