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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
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See also:
arrCharPoly;
arrPoincare.
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