Delta-compactness of an algebraic sum of sets
β Scribed by A. I. Vasil'ev
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 1979
- Tongue
- English
- Weight
- 243 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0001-4346
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
A theorem on the extendability of certain subsets of a Boolean algebra to ultrafilters which preserve countably many infinite meets (generalizing Rasiowa-Sikorsld) is used to pinpoint the mechanism of the Barwise proof in a way which bypasses the set theoretical elaborations. ## Technical summary
We discuss a composition operation of delta-matroids, called delta-sum, in relation to similar compositions of related combinatorial structures like matroids and jump systems. The delta-sum of matching delta-matroids is associated with the linkings of a graph. We exhibit a min-max formula for the po