E. Zikkos

collaborators

2 papers

math.FA2026

Hardy Subspaces with Sparse Fourier Spectrum and Muntz Space

Elias Zikkos

Let $I^ = {I^»_{n}}_{n = 1}^{\infty} \subset N$ with $I^»_{n}$ strictly increasing and such that $\sum_{n = 1}^{\infty} I^»_{n}^{- 1} < \infty$ . We show that a Hardy subspace $H^2 (\mathbb{D…

math.FA2026

The Gaussian Gabor system at the critical density is a weighted lower semi frame

Elias Zikkos

We show that the Gaussian Gabor system at the critical density is a weighted lower semi frame, thus resolving an open question. This complements recent results showing that the sys…