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D.14.1.42 arrChambers

Procedure from library arr.lib (see arr_lib).

Usage:
arrChambers(A); arr A

Return:
[int] The number of chambers of an arrangement, which is equal to the evaluation of the Poincare polynomial at 1.

Example:
 
LIB "arr.lib";
ring R = 0,(x,y),dp;
arr A = ideal(x,y,x+y-1);
arrChambers(A);
==> 7
See also: arrBoundedChambers; arrChambers; arrPoincare.