A note on topologically nilpotent Banach algebras P. Dixon; V. Müller — 1992 Studia Mathematica A Banach algebra A is said to be topologically nilpotent if s u p ∥ x ₁ . . . . . . x n ∥ 1 / n : x i ∈ A , ∥ x i ∥ ≤ 1 ( 1 ≤ i ≤ n ) tends to 0 as n → ∞. We continue the study of topologically nilpotent algebras which was started in [2]
A Jacobson-semisimple Banach algebra with a dense nil subalgebra P. G. Dixon — 1977 Colloquium Mathematicae