12 citations · 25 across the 26 of their papers we have counts for
5 papers · 1 filter
Lipschitz Estimates and an application to trace formulae
Tirthankar Bhattacharyya, Arup Chattopadhyay, Saikat Giri +1
In this note, we provide an elementary proof for the expression of in the form of a double operator integral for every Lipschitz function on the unit circle $\cir$…
Estimates and Higher-Order Spectral Shift Measures in Several Variables
Arup Chattopadhyay, Saikat Giri, Chandan Pradhan
In recent years, higher-order trace formulas of operator functions have attracted considerable attention to a large part of the perturbation theory community. In this direction, we…
Trace formulas in higher dimensions
Arup Chattopadhyay, Saikat Giri, Chandan Pradhan +1
The paper establishes the Krein and Koplienko trace formulas for multivariable operator functions on symmetrically normed ideals of bounded operators. Results are proved for self-a…
Schmidt subspaces of block Hankel operators
Arup Chattopadhyay, Soma Das, Chandan Pradhan
In scalar-valued Hardy space, the class of Schmidt subspaces for a bounded Hankel operator are closely related to nearly -invariant subspaces, as described by Gérard and Pushn…
Approximation of the spectral action functional in the case of -compact resolvents
Arup Chattopadhyay, Chandan Pradhan, Anna Skripka
We establish estimates and representations for the remainders of Taylor approximations of the spectral action functional on bounded self-adjoint perturbations…