“open ball”的概念、定义、翻译、参考文献-科学参考

单词	open ball
释义	open ball [`ō·pǝn `bȯl] ^MATHEMATICS In a metric space, an open set about a point x which consists of all points within a fixed distance from x.
随便看	typhoon wind typhus fever typography typography point Typotheria typp tyramine Tyranni Tyrannidae Tyrannoidea tyrocidine tyrolite tyrosamine tyrosinase tyrosine tyrosinemia tyrosinosis tyrothricin Tyson's gland Tytonidae tyuyamunite tyvelose TΩ U u

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