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ArrBettiNumbers

Betti numbers of an arrangement of hyperplanes

Syntax
ArrBettiNumbers(A: LIST): LIST

Description
This function returns the list [b_0,b_1,...,b_l] of the Betti numbers from the list A of hyperplanes in the arrangement.

Example
/**/ use QQ[x,y];	
/**/ A := [x, x-y, y];
/**/ ArrBettiNumbers(A);
[1,  3,  2]

See Also