Volume 16, Issue 1 Georgios Tsikalas A note on a spectral constant associated with an annulus Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Georgios Tsikalas Find more articles with the same keywords spectral set k-spectral set intersection of spectral sets weighted shift Find more articles with the same subject classes 47A25 47A10