Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9516314 | Topology | 2005 | 13 Pages |
Abstract
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.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Geometry and Topology
Authors
Lê Minh Hà ,