Journal of Mathematical Inequalities · Volume 17, Issue 1 Approximation of two general functional equations in 2-Banach spaces 17-11 Pages 153-162 DOI 10.7153/jmi-2023-17-11 Downloads Short PDF Full PDF PNG Authors Choonkil Park Abbas Najati M. B. Moghimi B. Noori Keywords Ulam stability hyperstability fixed point method 2-Banach space functional equation linear functional equation Subject classes 39B82 47H10 39B72