def len_le_nil
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/poly.bend as Polyimport Base
50def len_le_nil(+n: Nat) -> {len_le(n, Nil{}) == True{} : Bool}:
51 match n:
52 case 0n:
53 {==}
54 case 1n+m:
55 {==}