def maximum_right

stelliferous@0.0.2.0 · proofs/nat_extrema.bend:56

import Base
import stelliferous@0.0.2.0/proofs/nat_order.bend as Order

56def maximum_right(+left: Nat,+right: Nat) -> {Nat.is_le(right,Nat.max(left,right)) == True{} : Bool}:
57  match left right:
58    case 0n +right: Order.reflexive(right)
59    case 1n+left 0n: {==}
60    case 1n+left 1n+right: maximum_right(left,right)