P. Muthukumar

collaborators

2 papers

math.FA2025

Multiplicative operators on analytic function spaces

Kanha Behera, Junming Liu, P. Muthukumar

H. J. Schwartz proved in his thesis (1969) that a nonzero bounded operator on Hardy spaces $(H^{p}, 1 \leq p \leq \infty)$ is almost multiplicative if and only if it is a composition op…

math.CV2025

Automorphisms of subalgebras of bounded analytic functions

Kanha Behera, Rahul Maurya, P. Muthukumar

Let $H^{\infty}$ denote the algebra of all bounded analytic functions on the unit disk. It is well-known that every (algebra) automorphism of $H^{\infty}$ is a composition operator ind…