Volume 22, Issue 3 István Blahota Károly Nagy George Tephnadze Approximation by Marcinkiewicz ϴ-means of double Walsh-Fourier series 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 István Blahota Károly Nagy George Tephnadze Find more articles with the same keywords Walsh group Walsh system Walsh-Fourier series Nörlund mean weighted mean approximation modulus of continuity Lipschitz function ϴ-mean two-dimensional system quadratical partial sum Find more articles with the same subject classes 42C10