Abstract
Our starting point is the well-known Jordan-von Neumann characterization of inner product spaces by the parallelogram equality [JvN]:
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© 1986 Springer Basel AG
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Amir, D. (1986). The Parallelogram Equality and Derived Equalities. In: Characterizations of Inner Product Spaces. Operator Theory: Advances and Applications, vol 20. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5487-0_2
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DOI: https://doi.org/10.1007/978-3-0348-5487-0_2
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-0348-5489-4
Online ISBN: 978-3-0348-5487-0
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