On the Gray index of phantom maps
https://doi.org/10.1016/j.top.2004.08.001Publisher, magazine: ,
Publication year: 2005
Lưu Trích dẫn Chia sẻAbstract
We study a homotopy invariant of phantom maps called the Gray index. In particular, it is conjectured that the Gray index of an essential phantom map between finite-type spaces is always finite. We obtain some partial results on this conjecture, using a tower-theoretic interpretation of the Gray index.
Tags: Phantom map,Gray index,Inverse tower,Image subtower
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