intclToricRing S
i1 : R=ZZ/37[x,y,t];
i2 : S=createMonomialSubalgebra {x^3, x^2*y, y^3, x*y^2};
i3 : intclToricRing S ZZ o3 = --[y, x] 37 o3 : monomial subalgebra of R