We construct ‘‘almost periodic’’ unbounded domains, where a large class of elliptic spectral problems have essential spectra possessing peculiar structure: they consist of monotone, non-negative sequences of isolated points and thus have infinitely many gaps.
| Original language | English |
|---|---|
| Pages (from-to) | 939-969 |
| Number of pages | 31 |
| Journal | Atti della Accademia Nazionale dei Lincei, Classe di Scienze Fisiche, Matematiche e Naturali, Rendiconti Lincei Matematica E Applicazioni |
| Volume | 31 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2020 |
ID: 88366322