| #### D.4.24.7 regCM Procedure from library `noether.lib` (see noether_lib). Usage: regCM (i); i ideal Return: the Castelnuovo-Mumford regularity of i. (returns -1 if i is not homogeneous) Assume: i is a homogeneous ideal. Example:
    LIB "noether.lib";
    ring r=0,(t,a,b,c,d),dp;
    ideal i=b4-a3d, ab3-a3c, bc4-ac3d-bcd3+ad4, c6-bc3d2-c3d3+bd5, ac5-b2c3d-ac2d3+b2d4, a2c4-a3d3+b3d3-a2cd3, b3c3-a3d3, ab2c3-a3cd2+b3cd2-ab2d3, a2bc3-a3c2d+b3c2d-a2bd3, a3c3-a3bd2, a4c2-a3b2d;
    regCM(i);
    ==> reg(i)=7 and the time of this computation: 4 sec./100

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