3 papers
cs.IT2025
Optimal shift-invariant spaces from uniform measurements
Rohan Joy, Radha Ramakrishnan
Let be a positive integer and be a collection of closed subspaces in . Given the measurements $\mathcal{F}_Y=\left\lbrace \left\lbrace y_k^1 \rig…
math.CA2024
Discrete Calderon condition for the twisted wavelet system
Radha Ramakrishnan, Rabeetha Velsamy
In this paper, we obtain an analogue of the discrete Calderon condition and prove that this condition is sufficient for an orthonormal twisted wavelet system to be complete in L^{2…
math.FA2022
Systems of Left Translates and Oblique Duals on the Heisenberg Group
S. R. Das, P. Massopust, R. Radha
In this paper, we characterize the system of left translates , , to be a frame sequence or a \emph{Riesz} sequence in te…