Abstract
Two stability results are proved. The first one states that Hosszú’s functional equation
is stable. The second is a local stability theorem for additive functions in a Banach space setting.
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Losonczi, L. On the stability of Hosszú’s functional equation. Results. Math. 29, 305–310 (1996). https://doi.org/10.1007/BF03322226
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DOI: https://doi.org/10.1007/BF03322226