| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4661351 | Topology and its Applications | 2007 | 12 Pages |
Abstract
The aim of this note is to prove the following result: “Assume that X is a metric Borel space of class ξ, that is continuous, that every fiber f−1(y) is complete and that every countable compact subset of Y is the image by f of some compact subset of X. Then Y is Borel and moreover of class ξ”. We give also an extension to the case where the fibers are only assumed to be Polish.
Related Topics
Physical Sciences and Engineering
Mathematics
Geometry and Topology
