| #### D.4.18.8 annil Procedure from library `mprimdec.lib` (see mprimdec_lib). Usage: annil(N); modul N Return: ideal ann=std(quotient(N,freemodule(nrows(N)))); the annihilator of M/N in the basering Note: ann is a std basis in the basering Example:
    LIB "mprimdec.lib";
    ring r=0,(x,y,z),dp;
    module N=x*gen(1), y*gen(2);
    ideal ann=annil(N);
    ann;
    ==> ann[1]=xy

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