compact perturbations 1essential spectrum 1moore-penrose inverse 1operator factorization 1partial isometries 1Schatten class 1
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math.FA2026
Spectral Characterizations of Schatten-class perturbations of Partial isometries
Neeru Bala, Ramesh Golla
The paper provides criteria for when a bounded operator is a compact or Schatten‑class perturbation of a scalar multiple of a partial isometry with finite‑dimensional kernel, using…
math.FA2024
Hyperinvariant subspaces for normaloid essential isometric operators
Neeru Bala, Ramesh Golla
In this article, we prove the existence of a non-trivial hyperinvariant subspace for a subclass of compact perturbations of scalar multiple of a partial isometry. Later, we illustr…