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math.FA2022
An Application of the supremum cosine angle between multiplication invariant spaces in $L^2(X; \mc H)$
Sudipta Sarkar, Sahil Kalra, Niraj K. Shukla
In this article, we describe the supremum cosine angle between two multiplication invariant (MI) spaces and its connection with the closedness of the sum of those spaces. The resul…
math.FA2022
Characterizations of Extra-invariant spaces under the left translations on a Lie group
Sudipta Sarkar, Niraj K. Shukla
In the context of a connected, simply connected, nilpotent Lie group, whose representations are square-integrable modulo the center, we find characterization results of extra-invar…