| 11. | The real line with the lower limit topology is not metrizable.
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| 12. | The domain is the real line \ mathbb { R }.
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| 13. | Generalizing this property of the real line leads to the study of o-minimality.
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| 14. | Geodesics going to the origin cannot be defined on the entire real line.
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| 15. | The real line can also be given the lower limit topology.
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| 16. | Where \ lambda is the Lebesgue measure on the real line.
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| 17. | Some other lines on Sodor are heavily inspired by real lines.
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| 18. | By the connectedness of the real line there must be something between them.
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| 19. | Analogous definitions apply on the real line, and in higher dimensions.
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| 20. | Consider the real line \ mathbb { R } with its usual Borel topology.
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