| 31. | In 1883, Cantor extended the natural numbers with his infinite ordinals.
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| 32. | Throughout this article the word " number " refers to a natural number.
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| 33. | The set of computable numbers has the same cardinality as the natural numbers.
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| 34. | The universe of the model will be the natural numbers.
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| 35. | Similarly, most subsets of the natural numbers are not computable.
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| 36. | The latter formula means the sum of all natural numbers from 1 to 100.
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| 37. | The integers form the smallest ring containing the natural numbers.
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| 38. | Let & fnof; be a function on the natural numbers.
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| 39. | Thus the set of the first ten natural numbers is.
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| 40. | Rational numbers are constructed by the division of natural numbers.
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