R : Type u_1
inst✝ : Semiring R
a : R
n : ℤ
⊢ (Finsupp.single n a).support ⊆ {n}
R : Type u_1
inst✝ : Semiring R
a : R
n : ℤ
⊢ (↑C a * T n).support ⊆ {n}
rw [← single_eq_C_mul_T]
no goals
R : Type u_1
inst✝ : Semiring R
a : R
n : ℤ
⊢ (Finsupp.single n a).support ⊆ {n}
exact support_single_subset