3 papers
math.GM2026
Adaptive Filtering via Canonical Systems with Time-Varying Hamiltonians
Keshav Raj Acharya, Pitambar Acharya
In many practical applications, signals and environments are time- varying, which makes fixed filters unreliable. Adaptive filtering, on the other hand, updates in real time to sup…
math-ph2026
Self-adjoint realizations of 2d-dimensional canonical systems and applications
Keshav Raj Acharya, Andrei Ludu
This paper studies linear relations and their self-adjoint realizations arising from 2d-dimensional canonical systems, with a focus on how the symplectic structure interacts with b…
math.SP2026
Remling's Theorem for vector-valued discrete Schrodinger operators
Keshav Raj Acharya
This paper extends Remling's Theorem to vector-valued discrete Schrodinger operators, showing that the Ï limit points of the matrix potentials, under the shift map, are reflection…