Singular Manual: arrCharPoly

| #### D.14.1.40 arrCharPoly Procedure from library `arr.lib` (see arr_lib). Usage: arrCharPoly(arr A) Return: [intvec] coefficients of the characteristic polynomial of A in increasing order Remarks: The algorithm only returns the coefficients of the characteristic polynomial since they are whole numbers but the basering could be something different. Example:
    LIB "arr.lib";
    ring R = 0,(x,y,z,u,v),dp;
    arr A = arrBraid(5);
    intvec v = arrCharPoly(A);
    x*(x-1)*(x-2)*(x-3)*(x-4);
    ==> x5-10x4+35x3-50x2+24x
    v;
    ==> 24,-50,35,-10,1
See also: arrCharPoly; arrPoincare.

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