Volume 14, Issue 2 Lingju Kong Min Wang Multiple solutions for a nonlinear discrete problem of the second order 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 Lingju Kong Min Wang Find more articles with the same keywords discrete problems multiple nontrivial solutions variational methods mountain pass lemma the invariant sets of descending flow Find more articles with the same subject classes 39A27 39A70