On the stability of the quadratic mapping in normed spaces

Springer Science and Business Media LLC - Tập 62 Số 1 - Trang 59-64 - 1992
St. Czerwik1
1Institute of Mathematics, Silesian University of Technology, Gliwice, Poland

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Tài liệu tham khảo

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T.M. Rassias, On the Stability of the Linear Mapping in Banach Spaces, Proc. Amer. Math. Soc.72 (2) (1978), 297–300.

S.M. Ulam, A Collection of Mathematical Problems, Interscience Publishers Inc. New York 1960.