منابع مشابه
The Möbius-pompeïu Metric Property
Let us consider analogous problem for the metric space (X, d) with at least four points. Let A,B,C ∈ X be three fixed points. Then, for the point M ∈ X we suppose that a triangle can be formed from the distances d1 = d(M,A), d2 = d(M,B) and d3 = d(M,C) iff the following conjunction of inequalities is true: d1 + d2 − d3 ≥ 0 and d2 + d3 − d1 ≥ 0 and d3 + d1 − d2 ≥ 0. (1.1) If in conjunction (1.1)...
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ژورنال
عنوان ژورنال: Fundamenta Mathematicae
سال: 1961
ISSN: 0016-2736,1730-6329
DOI: 10.4064/fm-50-1-13-20