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math.FA2022
Essential norms of pointwise multipliers in the non-algebraic setting
Tomasz Kiwerski, Jakub Tomaszewski
Motivated by some recent results, but also referring to recognized classics, we compute the essential norm and the weak essential norm of multiplication operators acting between tw…
math.LO2022
Borel complexity of the set of typical numbers
Jakub Tomaszewski
In the present note we study the interrelations between the sets of so-called typical numbers and numbers that are normal in base two. Employing results by Nakai and Shiokawa, we e…