 It can be engineered, formally by lifting the super Yang–Mills theory to six dimensions, then compactifying on 2-torus, while twisting the four dimensional spacetime around the two non-contractible cycles.In addition, one twists fermions so as to produce covariantly constant spinors generating unbroken supersymmetries.The two parameters formula_12, formula_17
of the formula_14-background correspond to the angles of the spacetime rotation.