Abstract
In this paper we consider the problem of the stability of a quadratic equation in some abstract space in the sense of Hyers-Ulam-Rassias. This is a generalisation of an idea originally stated by S. M. Ulam for the linear (Cauchy) equation. Similar problems for other equations are actually investigated by several mathematicians.
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Czerwik, S. (1998). On the Stability of the Quadratic Functional Equation and Related Topics. In: Milovanović, G.V. (eds) Recent Progress in Inequalities. Mathematics and Its Applications, vol 430. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9086-0_25
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DOI: https://doi.org/10.1007/978-94-015-9086-0_25
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-4945-2
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