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Combinatorics (combinatorial analysis) is a branch of mathematics that studies the discrete objects, the set (a combination, permutation, deployment and transfer of elements) and the relationship to them (eg, partial order).
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What are the benefits of cutting by half the number of multiplications needed to calculate n?
I found this article on a method that also cuts the number of multiplications by half using a different method to get the numbers used to calculate $N!$ than the one in the above post. This method was …