Mathematical Journal of Okayama University 59巻 1号
2017-01 発行

Some examples of non-tidy spaces

Matsushita, Takahiro Graduate School of Mathematical Sciences, The University of Tokyo
Publication Date
2017-01
Abstract
We construct a free Z2-space Xn for a positive integer n such that w1(Xn)n ≠ 0 but there is no Z2-map from S2 to Xn.