def p_len_take_le

bend-osdev-bytes@0.1.1.0 · PROOF.bend:1107

import Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B

1107def p_len_take_le(+n: Nat, +o: B.Octets, h: {Nat.is_le(n, B.Octets.len(o)) == True{} : Bool}) -> {B.Octets.len(B.Octets.take(n, o)) == n : Nat}:
1108  Equal.trans(Nat, B.Octets.len(B.Octets.take(n, o)), Nat.min(n, B.Octets.len(o)), n, p_len_take(n, o), off.min_le(n, B.Octets.len(o), h))