Characterization of Structured Exponential Systems
We provide characterizations for when an exponential system with a structured spectrum forms a frame, a Riesz sequence, a Riesz basis, or an orthogonal basis on unions of translated domains. These characterizations are expressed in terms of the mapping properties of an associated matrix, with periodic spectra included as a special case.
Authors
- Dae Gwan Lee (ORCID: https://orcid.org/0000-0002-0991-738X)
Institutions
- Pukyong National University (KR)
Publication Details
- Journal
- Mathematics
- Published
- 2026-10-27
- DOI
- https://doi.org/10.3390/math14213917
- Primary Topic
- Mathematical Analysis and Transform Methods
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Pukyong National University