Journal Article Some examples of non-tidy spaces

Matsushita, Takahiro

59 ( 1 )  , pp.21 - 25 , 2017-01 , Department of Mathematics, Faculty of Science, Okayama University
ISSN:0030-1566
NCID:AA00723502
Description
We construct a free Z<sub>2</sub>-space <i>X<sub>n</sub></i> for a positive integer <i>n</i> such that <i>w<sub>1</sub>(X<sub>n</sub>)<sup>n</sup></i> &ne; 0 but there is no Z<sub>2</sub>-map from <i>S</i><sup>2</sup> to <i>X<sub>n</sub></i>.
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http://ousar.lib.okayama-u.ac.jp/files/public/5/54711/20161220154204961611/mjou_059_021_025.pdf

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