Theorem: Polynomial.discConv_sub (LeanCamCombi/DiscreteDeriv.lean)

State before:
ι : Type u_1
R : Type u_2
S : Type u_3
inst✝² : CommRing R
inst✝¹ : CommRing S
inst✝ : Algebra S R
w✝ : R →₀ S
P✝ : R[X]
w : R →₀ S
P Q : R[X]
⊢ discConv w (P - Q) = discConv w P - discConv w Q
Tactic:
simp [discConv, smul_sub]
State after:
no goals