{"version":"1.0","type":"link","title":"Spectral set - Newikis","description":"In operator theory, a set is said to be a spectral set for a (possibly unbounded) linear operator on a Banach space if the spectrum of is in and von-Neumann's inequality holds for on - i.e. for all rational functions with no poles on","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}