Volume 5, Issue 4 Aleksey Kostenko The similarity problem for indefinite Sturm-Liouville operators with periodic coefficients 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 Aleksey Kostenko Find more articles with the same keywords J-self-adjoint operator Sturm-Liouville operator Similarity critical points Find more articles with the same subject classes 47E05 34B24 34B09 34L10 47B50