Volume 12, Issue 1 Nigar M. Aslanova Mamed Bayramoglu Khalig M. Aslanov Some spectral properties of fourth order differential operator equation 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 Nigar M. Aslanova Mamed Bayramoglu Khalig M. Aslanov Find more articles with the same keywords Hilbert space differential operator equation spectrum interlacing trace class operators regularized trace Find more articles with the same subject classes 34B05 34G20 34L20 34L05 47A05 47A10