| #### D.2.12.20 hasMixedOrdering Procedure from library `ring.lib` (see ring_lib). Usage: hasMixedOrdering(); Return: 1 if ordering of basering is mixed, 0 else Example:
    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

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