separable space
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metrizable space
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metric space
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countable set
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compact space
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dense set
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Hausdorff space
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Springer Science+Business Media
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second-countable space
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lower limit topology
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mathematics
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International Standard Book Number
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algorithm
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rational number
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digital object identifier
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numerical analysis
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sequence
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Stefan Banach
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continuous function
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Euclidean space
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bibcode
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