On the first homology of Peano continua

被引:2
|
作者
Conner, Gregory R. [1 ]
Corson, Samuel M. [2 ]
机构
[1] Brigham Young Univ, Dept Math, Provo, UT 84602 USA
[2] Vanderbilt Univ, Dept Math, Nashville, TN 37240 USA
关键词
fundamental group; homology; descriptive set theory; SPACE;
D O I
10.4064/fm232-1-3
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We show that the first homology group of a locally connected compact metric space is either uncountable or finitely generated. This is related to Shelah's well-known result (1988) which shows that the fundamental group of such a space satisfies a similar condition. We give an example of such a space whose fundamental group is uncountable but whose first homology is trivial, showing that our result does not follow from Shelah's. We clarify a claim made by Pawlikowski (1998) and offer a proof of the clarification.
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页码:41 / 48
页数:8
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