. exact reducible_GL_K4Loeb;
case left
α : Type u_1
inst✝ : DecidableEq α
⊢ 𝐆𝐋 ≤ₛ 𝐊𝟒(𝐋)

case right
α : Type u_1
inst✝ : DecidableEq α
⊢ 𝐊𝟒(𝐋) ≤ₛ 𝐆𝐋
case right
α : Type u_1
inst✝ : DecidableEq α
⊢ 𝐊𝟒(𝐋) ≤ₛ 𝐆𝐋