NatExtrema.maximum_left: def of stelliferous@0.0.2.0
Import: import stelliferous@0.0.2.0/proofs/nat_extrema.bend as NatExtrema
Lines 50-54 of stelliferous@0.0.2.0/proofs/nat_extrema.bend: https://jend.leeeet.dev/read.txt?path=stelliferous@0.0.2.0/proofs/nat_extrema.bend&start_line=50&end_line=54

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

def maximum_left(+left: Nat,+right: Nat) -> {Nat.is_le(left,Nat.max(left,right)) == True{} : Bool}:
  match left right:
    case 0n right: Order.zero_le(right)
    case 1n+ +left 0n: Order.reflexive(left)
    case 1n+left 1n+right: maximum_left(left,right)

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.max
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/nat_order.bend&name=reflexive
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/nat_order.bend&name=zero_le