Volume 17, Issue 1 Choonkil Park Abbas Najati M. B. Moghimi B. Noori Approximation of two general functional equations in 2-Banach spaces 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 Choonkil Park Abbas Najati M. B. Moghimi B. Noori Find more articles with the same keywords Ulam stability hyperstability fixed point method 2-Banach space functional equation linear functional equation Find more articles with the same subject classes 39B82 47H10 39B72