On phantom maps into co-H-spaces

Date: 
2016/05/09 Mon 16:00 - 17:00
Room: 
Room 609, Building No.6
Speaker: 
Kouyemon Iriye
Affiliation: 
Osaka Prefecture University
Abstract: 

Schwass obtained the following result. "Let $Y$ be a simply connected co-H-space. Then $Y$ is the target of essential phantom maps from finite type domains if and only if $Y$ is rationally non-trivial." I will give an elementary proof for his result.