Volume 16, Issue 2 Zameddin I. Ismailov Rukiye Öztürk Mert Gaps between some spectral characteristics of direct sum of Hilbert space operators 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 Zameddin I. Ismailov Rukiye Öztürk Mert Find more articles with the same keywords operator norm spectral radius numerical radius Find more articles with the same subject classes 47A05 47A10 47A12 47A30 47B15 47B47