The problem of S. M. Ulam for approximately multiplicative mappings
The author discusses the celebrated Ulam's problem of describing the functionals satisfying an \(\varepsilon\)-version of multplicative or additive law. The structure of a so-called ANMN-algebra, i.e., an algebra with ``integrity'', that is, whose every approximately miltiplicative functional is near multiplicative.
scientific article; zbMATH DE number 1496298
scientific article