Volume 4, Issue 2 Stamatis Koumandos Some inequalities for cosine sums 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 Stamatis Koumandos Find more articles with the same keywords cosine sums Fourier series Find more articles with the same subject classes 42A05 42A32