ring.lib
LIB "ring.lib"; ring R1 = 0,(x,y,z),dp; hasMixedOrdering(); ==> 0 ring R2 = 31,(x(1..4),y(1..3)),(ds(4),lp(3)); hasMixedOrdering(); ==> 1 ring R3 = 181,x(1..9),(dp(5),lp(4)); hasMixedOrdering(); ==> 0