Piecewise scaling of frames and Riesz bases
Speaker:
Laura De carli, Florida International University
Date and Time:
Monday, May 9, 2022 - 4:20pm to 4:50pm
Location:
Fields Institute, Room 230
Abstract:
Given a frame (or a Riesz basis) F={fj}j∈I in a space of square integrable functions H, we consider the set φF obtained by multiplying the fj by piecewise constant functions φj. We find conditions that ensure that φF is still a frame (or a Riesz basis) in some special and significant case. When F is finite, we present necessary and sufficient conditions that ensure that φF is a Parseval frame in H. The results presented in this talk are part of joint papers with J. Edward, P. Casazza and T. Tran