Some upper bounds on ordinal-valued Ramsey numbers for colourings of pairs
Some upper bounds on ordinal-valued Ramsey numbers for colourings of pairs
复制标题
用于对着色的有序值拉姆齐数的一些上限
DOI:
10.1007/s00029-020-00577-3
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Yokoyama Keita
中科院分区:
文献类型:
--
作者:
Kolodziejczyk Leszek Aleksander;Yokoyama Keita
We study Ramsey’s theorem for pairs and two colours in the context of the theory of-large sets introduced by Ketonen and Solovay. We prove that any 2-colouring of pairs from an-large set admits an-large homogeneous set. We explain how a formalized version of this bound gives a more direct proof, and a strengthening, of the recent result of Patey and Yokoyama (Adv Math 330: 1034–1070, 2018) stating that Ramsey’s theorem for pairs and two colours is-conservative over the axiomatic theory(recursive comprehension).
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DOI:
10.1016/s0049-237x(08)71130-3
发表时间:
1977
期刊:
Studies in logic and the foundations of mathematics
影响因子:
--
作者:
J. Paris
通讯作者:
J. Paris
DOI:
--
发表时间:
2010
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
M. Smet;A. Weiermann
通讯作者:
A. Weiermann
DOI:
10.1016/j.apal.2017.03.005
发表时间:
2017
期刊:
Ann. Pure Appl. Log.
影响因子:
--
作者:
A. Bovykin;A. Weiermann
通讯作者:
A. Weiermann
影响因子:
0.6
作者:
Peter A. Cholak
通讯作者:
Peter A. Cholak
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
Jussi KETONENt;Robert SOLOVAYtt
通讯作者:
Robert SOLOVAYtt