Classes of Polish Spaces Under Effective Borel Isomorphism(Memoirs of the American Mathematical Society)

有效博雷尔同构波兰空间类(丛书)

拓扑学

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作      者
出版时间
2016年04月30日
装      帧
平装
ISBN
9781470415631
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页      码
87
开      本
7.2 x 0.2 x 10.2 inches
语      种
英文
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图书简介
The author studies the equivalence classes under $Delta^1_1$ isomorphism, otherwise effective Borel isomorphism, between complete separable metric spaces which admit a recursive presentation and he shows the existence of strictly increasing and strictly decreasing sequences as well as of infinite antichains under the natural notion of $Delta^1_1$-reduction, as opposed to the non-effective case, where only two such classes exist, the one of the Baire space and the one of the naturals.
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