k : Type u₁
G : Type u₂
inst✝ : Semiring k
f : AddMonoidAlgebra k G
⊢ f ∈ Submodule.span k ((fun a => single a 1) '' ↑f.support)
k : Type u₁
G : Type u₂
inst✝ : Semiring k
f : AddMonoidAlgebra k G
⊢ f ∈ Submodule.span k (of' k G '' ↑f.support)
delta of'
no goals
k : Type u₁
G : Type u₂
inst✝ : Semiring k
f : AddMonoidAlgebra k G
⊢ f ∈ Submodule.span k ((fun a => single a 1) '' ↑f.support)
rw [← Finsupp.supported_eq_span_single, Finsupp.mem_supported]