def eta_fin

bend-collections-laws-math@1.0.0.0 · proofs/math/typed/w64clz.bend:87

import Base
import bend-collections-laws-math@1.0.0.0/src/math/w64.bend as X

87def eta_fin(st: Nat & U32) -> {X.bl_fin(st) == X.bl_fin((P1(st), P2(st))) : Nat}:
88  match st:
89    case Tuple{+b, +y}:
90      {==}