| #### D.5.17.4 ChowRing Procedure from library `schubert.lib` (see schubert_lib). Usage: ChowRing(V); V variety Assume: V is an abstract variety Return: qring Example:
    LIB "schubert.lib";
    ring r = 0,(h,e),wp(1,1);
    ideal rels = he,h2+e2;
    int d = 2;
    variety V = makeVariety(2,rels);
    ChowRing(V);
    ==> // coefficients: QQ considered as a field
    ==> // number of vars : 2
    ==> //        block   1 : ordering dp
    ==> //                  : names    h e
    ==> //        block   2 : ordering C
    ==> // quotient ring from ideal ...

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