| #### D.12.4.5 monomialLcm Procedure from library `teachstd.lib` (see teachstd_lib). Usage: monomialLcm(m,n); m,n of type poly or vector Return: least common multiple of leading monomials of m and n, of type poly Note: if m = (x1...xr)^(a1,...,ar)*gen(i) (gen(i)=1 if m is of type poly) and n = (x1...xr)^(b1,...,br)*gen(j), then the proc returns (x1,...,xr)^(max(a1,b1),...,max(ar,br)) if i=j and 0 if i!=j. Example:
    LIB "teachstd.lib";
    ring r=0,(x,y,z),ds;
    monomialLcm(xy2,yz3);
    ==> xy2z3
    monomialLcm([xy2,xz],[yz3]);
    ==> 0
    monomialLcm([xy2,xz3],[yz3]);
    ==> xy2z3

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