def Comb.value
import bend-collections-laws-math@1.0.0.0/spec/math/natural.bend as Naturalimport Base
import bend-collections-laws-math@1.0.0.0/src/math/natural.bend as M
191def Comb.value(+n: Nat, +k: Nat) -> Type:
192 {M.comb(n, k) == choose(n, k) : Nat}