| #### D.6.19.6 HilbertClassPoly Procedure from library `realclassify.lib` (see realclassify_lib). Return: the monic polynomial of degree h(D) in Z[X] of which jOft((D+sqr(D))/2) is a root Assume: D is a negative discriminant Note: k is input for the procedure "jOft", 5*k is input for the procedure "sqr", 10*k describes the number of decimals being calculated in the complex numbers Example:
    LIB "realclassify.lib";
    ring r = 0,x,dp;
    bigint D=-23;
    HilbertClassPoly(D,50);
    ==> x3+3491750x2-5151296875x+12771880859375

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