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
.
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