Volume 14, Issue 1 Iwona Tyrala A characterization of the sine function by functional inequalities 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 Iwona Tyrala Find more articles with the same keywords stability d'Alembert's equation Wilson's equation functional inequality Find more articles with the same subject classes 39B62 39B82