Volume 17, Issue 1 Fu Sun Xiaoxue Han The bounds of eigenvalue for complex singular boundary value problems 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 Fu Sun Xiaoxue Han Find more articles with the same keywords perturbation of Legendre eigenvalue problem dissipative operators limit-circle a priori bounds Find more articles with the same subject classes 34B05 34B09 34L15