case zero
S : Type u
inst✝ : Semiring S
⊢ eval 0 (pochhammer S Nat.zero) = if Nat.zero = 0 then 1 else 0

case succ
S : Type u
inst✝ : Semiring S
n✝ : ℕ
⊢ eval 0 (pochhammer S (Nat.succ n✝)) = if Nat.succ n✝ = 0 then 1 else 0
S : Type u
inst✝ : Semiring S
n : ℕ
⊢ eval 0 (pochhammer S n) = if n = 0 then 1 else 0
cases n
no goals
case zero
S : Type u
inst✝ : Semiring S
⊢ eval 0 (pochhammer S Nat.zero) = if Nat.zero = 0 then 1 else 0
simp
no goals
case succ
S : Type u
inst✝ : Semiring S
n✝ : ℕ
⊢ eval 0 (pochhammer S (Nat.succ n✝)) = if Nat.succ n✝ = 0 then 1 else 0
simp [X_mul, Nat.succ_ne_zero, pochhammer_succ_left]