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Keywords:
inner product space; norm derivative $\rho ^{\prime }_{\pm }$; bisectrix; perpendicular bisector
inner product space; norm derivative $\rho ^{\prime }_{\pm }$; bisectrix; perpendicular bisector
Summary:
We define the radius of the inscribed and circumscribed circumferences in a triangle located in a real normed space and we obtain new characterizations of inner product spaces.
References:
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