Some examples of non-tidy spaces

Takahiro Matsushita
We construct a free Z 2 -space X n for a positive integer n such that w 1 (X n ) n = 0 but there is no Z 2 -map from S 2 to X n .
doi:10.18926/mjou/54711 fatcat:mg2iwnypaveknkfkp74s4olhke