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def pk.le_step

bend-osdev-pkcs7@0.1.0.0 · PROOF.bend:58

import bend-osdev-pkcs7@0.1.0.0/PROOF.bend as PROOF
import Base

58def pk.le_step(+x: Nat, +y: Nat) -> {Nat.is_le(x, y) == True{} : Bool} -> {Nat.is_le(x, 1n+y) == True{} : Bool}:
59  match x y:
60    case 0n _:
61      h => {==}
62    case 1n+xp 0n:
63      h => pk.absurd({Nat.is_le(1n+xp, 1n) == True{} : Bool}, h)
64    case 1n+xp 1n+yp:
65      h => pk.le_step(xp, yp)(h)

Uses (4)

Used by (1)