Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5778087 | Topology and its Applications | 2017 | 11 Pages |
Abstract
We show that for arbitrary linearly ordered set (X,â¤) any bounded family of (not necessarily, continuous) real valued functions on X with bounded total variation does not contain independent sequences. We obtain generalized Helly's sequential compactness type theorems. One of the theorems asserts that for every compact metric space (Y,d) the compact space BVr(X,Y) of all functions XâY with variation â¤r is sequentially compact in the pointwise topology. Another Helly type theorem shows that the compact space M+(X,Y) of all order preserving maps XâY is sequentially compact where Y is a compact metrizable partially ordered space in the sense of Nachbin.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Geometry and Topology
Authors
Michael Megrelishvili,