D.15.1.43 arrBoundedChambers

Usage:

arrBoundedChambers(A); arr A

Return:

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

LIB "arr.lib";
ring R = 0,(x,y),dp;
arr A = ideal(x,y,x+y-1);
arrBoundedChambers(A);
==> 1