Solution of a Problem of A. Ehrenfeucht and J. Mycielski
Solution of a Problem of A. Ehrenfeucht and J. Mycielski
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A. Ehrenfeucht 和 J. Mycielski 问题的解决方案
DOI:
10.1016/0097-3165(74)90018-1
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发表时间:
1974
期刊:
影响因子:
--
通讯作者:
G. Katona
中科院分区:
文献类型:
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作者:
G. Katona
Proof. 1. Define the subsets Ci, Di of X in the following way. Let Ci u Di be an arbitrary (k+ l)-tuple of X (1< i<(&)), and let Ci consist of the first k elements of this (k+ f)-tuple, Di the last 1. Denote this system by Ri={Ci, Ox>.2. Denote the maximal element of Ci by ei. If ei< ej, then every element of C, is< ei and every element of Dj is> ej. Hence Ci n Dj=~ zl. Similarly, if ei> ej, then Cj n Di= a. We can conclude that either