| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4659482 | Topology and its Applications | 2011 | 4 Pages |
Abstract
In this note we show that for the canonical map X1+X2→X, from the topological sum of two subspaces X1, X2 of X into X, to be of effective descent it is sufficient to be hereditarily a quotient map. Further, making use of the Brown–Janelidze categorical van Kampen Theorem, this translates into a van Kampen-type result.
Related Topics
Physical Sciences and Engineering
Mathematics
Geometry and Topology
