The Euclidean symmetric isosceles queasy four-point properties

Valentine, J. E.; Wayment, S. G.

doi:10.1090/S0002-9939-1972-0296823-5

The Euclidean symmetric isosceles queasy four-point properties
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by J. E. Valentine and S. G. Wayment PDF

Proc. Amer. Math. Soc. 34 (1972), 233-238 Request permission

Abstract:

The purpose of this paper is to show that a complete, convex, externally convex metric space is generalized euclidean if and only if it has the euclidean symmetric isosceles queasy four-point property or the euclidean external isosceles queasy four-point property.

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