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Some special properties of cofinality of ordinal numbers. (English) Zbl 0193.30802

MSC:

03E10 Ordinal and cardinal numbers

Keywords:

set theory
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References:

[1] Abian, A.: On the cofinality of ordinal numbers. Math. Ann.179, 142-152 (1969). · Zbl 0179.01701 · doi:10.1007/BF01350126
[2] Wolk, E. S.: Partially well ordered sets and partial ordinals. Fund. Math.60, 175-186 (1967). · Zbl 0153.02601
[3] Michael, E.: A class of partially ordered sets. Amer. Math. Monthly67, 448-449 (1960). · Zbl 0089.27003 · doi:10.2307/2309295
[4] Kruskal, J. B.: Well-quasi-ordering, the tree theorem, and Vazsonyi’s conjecture. Trans. Amer. Math. Soc.95, 210-225 (1960). · Zbl 0158.27002
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