最終更新日：2025/11/25
In an ultrametric space, every triangle is isosceles with the base not longer than the equal sides, reflecting the stronger triangle inequality d(x,z) < max(d(x,y), d(y,z)).
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In an ultrametric space, every triangle is isosceles with the base not longer than the equal sides, reflecting the stronger triangle inequality d(x,z) < max(d(x,y), d(y,z)).
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