def comb_ok

bend-collections-laws-math@1.0.0.0 · proofs/math/natural/fact.bend:277

import Base
import bend-collections-laws-math@1.0.0.0/src/math/natural.bend as M
import bend-collections-laws-math@1.0.0.0/spec/math/natural.bend as S

277# comb(n, k) == C(n, k)
278def comb_ok(+n: Nat, +k: Nat) -> {M.comb(n, k) == S.choose(n, k) : Nat}:
279  comb_small(n, k, Nat.is_lt(n, k), {==})