Description: If a set in the real line has a limit point than it contains two distinct points that are closer than a given distance. (Contributed by Glauco Siliprandi, 11-Dec-2019)
Ref | Expression | ||
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Hypotheses | lptre2pt.j | |
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lptre2pt.a | |
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lptre2pt.x | |
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lptre2pt.e | |
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Assertion | lptre2pt | |