Volume 18, Issue 2 Lei Feng Songping Zhou Trigonometric Inequalities in the MVBV Condition 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 Lei Feng Songping Zhou Find more articles with the same keywords trigonometric inequality mean value bounded variation Find more articles with the same subject classes 42A05