List.sorted_cons_cons_intro: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 840-847 of bend-mathlib@0.8.1.0/list.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/list.bend&start_line=840&end_line=847

import Base
import bend-mathlib@0.8.1.0/nat.bend as MNat

# A Nat list sorted by Nat.is_le stays sorted under a head that is <= the next element.
law sorted_cons_cons_intro:
  for -x: Nat
  for -y: Nat
  for -t: List<&2, Nat>
  for hxy: MNat.le(x, y)
  for hyt: sorted_by(~Nat, ~Nat.is_le, y <> t)
  sorted_by(~Nat, ~Nat.is_le, x <> y <> t)

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.zip
  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=bend-mathlib@0.8.1.0/list.bend&name=internal_sorted_cons_true
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/list.bend&name=sorted_by
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/nat.bend&name=le