Rounak Biswas

collaborators

2 papers

math.FA2026

Finite-rank commutators of projections onto shift-invariant subspaces

Rounak Biswas, Srijan Sarkar

In this article, using Halmos' two projections theorem, we completely characterize finite-rank commutators of orthogonal projections onto shift-invariant subspaces $ϕ_1 H^2(\mathbb…

math.FA2025

The generalized and pseudo $n$ -strong Drazin inverse of the sum of elements in Banach algebras

Rounak Biswas, Falguni Roy

In this paper, we begin by introducing some necessary and sufficient conditions for generalized $n$ -strong Drazin invertibility (g $n$ s-invertibility) and pseudo $n$ -strong Drazin i…

Finite-rank commutators of projections onto shift-invariant subspaces

The generalized and pseudo n-strong Drazin inverse of the sum of elements in Banach algebras

The generalized and pseudo $n$ -strong Drazin inverse of the sum of elements in Banach algebras