3 citations · 3 across the 6 of their papers we have counts for
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Koplienko-Neidhardt trace formula for unitaries A new proof
Arup Chattopadhyay, Soma Das, Chandan Pradhan
Koplienko \cite{Ko} found a trace formula for perturbations of self-adjoint operators by operators of Hilbert-Schmidt class . Later in 1988, a similar f…
Study of nearly invariant subspaces with finite defect in Hilbert spaces
Arup Chattopadhyay, Soma Das
In this article, we briefly describe nearly invariant subspaces with finite defect for a shift operator having finite multiplicity acting on a separable Hilbert space…
Almost invariant subspaces of the shift operator on vector-valued Hardy spaces
Arup Chattopadhyay, Soma Das, Chandan Pradhan
In this article, we characterize nearly invariant subspaces of finite defect for the backward shift operator acting on the vector-valued Hardy space which is a vectorial generaliza…
Kernels of Perturbed Toeplitz Operators in vector-valued Hardy spaces
Arup Chattopadhyay, Soma Das, Chandan Pradhan
Recently, Liang and Partington \cite{YP} show that kernels of finite-rank perturbations of Toeplitz operators are nearly invariant with finite defect under the backward shift opera…