| #### D.6.21.2 CMtype Procedure from library `spcurve.lib` (see spcurve_lib). Usage: CMtype(i); i an ideal, CM of codimension 2 Return: Cohen-Macaulay type of i (integer) (-1, if i is not Cohen-Macaulay of codimension 2) Example:
    LIB "spcurve.lib";
    ring r=32003,(x,y,z),ds;
    ideal i=xy,xz,yz;
    CMtype(i);
    ==> 2

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