Malaise
发表于 2025-3-28 15:41:44
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arrogant
发表于 2025-3-28 20:36:06
, 2018, Timisoara, Romania). It presents up-to-date insightful perspective and very resent research results on Ulam type stability of various classes of linear and nonlinear operators; in particular on the stability of many functional equations in a single and several variables (also in the lattice