change w' ∘ Equiv.refl _ = _ ↔ Monotone (w' ∘ Equiv.refl _)
case help
n d : ℕ
inst✝ : NeZero d
w w' : Weight n d
hw' : Monotone w'
hd : w ≤ w'
⊢ w' = Weight.comp w' (Tuple.sort w') ↔ Monotone w'
case help
n d : ℕ
inst✝ : NeZero d
w w' : Weight n d
hw' : Monotone w'
hd : w ≤ w'
⊢ w' ∘ ⇑(Equiv.refl (Fin (Nat.succ n))) = Weight.comp w' (Tuple.sort w') ↔
    Monotone (w' ∘ ⇑(Equiv.refl (Fin (Nat.succ n))))