Singular Manual: cyclotomic

| #### D.7.1.7 cyclotomic Procedure from library `finvar.lib` (see finvar_lib). Usage: cyclotomic(i); i integer > 0 Returns: the i-th cyclotomic polynomial (type <poly>) as one in the first ring variable Theory: x^i-1 is divided by the j-th cyclotomic polynomial where j takes on the value of proper divisors of i Example:
    LIB "finvar.lib";
    ring R=0,(x,y,z),dp;
    print(cyclotomic(25));
    ==> x20+x15+x10+x5+1

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