Volume 7, Issue 4 Uğur Gül Essential spectra of quasi-parabolic composition operators on Hardy spaces of the Poly-disc 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 Uğur Gül Find more articles with the same keywords composition operators Hardy spaces of the poly-disc essential spectra Find more articles with the same subject classes 32A45