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math.OA2023
Crossed products and C*-covers of semi-Dirichlet operator algebras
Adam Humeniuk, Elias G. Katsoulis, Christopher Ramsey
In this paper, we show that the semi-Dirichlet C*-covers of a semi-Dirichlet operator algebra form a complete lattice, establishing that there is a maximal semi-Dirichlet C*-cover.…
math.CO2023
Generating functions of substitutions
Aisling Pouti, Christopher Ramsey, Nicolae Strungaru
In this paper we study substitutions and some of their associated generating functions. This association takes aperiodicity to transcendence, and vice-versa. These generating funct…