Volume 1, Issue 1 Birgit Jacob Carsten Trunk Location of the spectrum of operator matrices which are associated to second order equations 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 Birgit Jacob Carsten Trunk Find more articles with the same keywords Block operator matrices second order equations spectrum essential spectrum Find more articles with the same subject classes 47A10 34G10 47D06