Semidynamical systems and Hilbert’s fifth problem
✍ Scribed by J. W. Neuberger
- Publisher
- Springer-Verlag
- Year
- 2008
- Tongue
- English
- Weight
- 809 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0343-6993
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
A finite vector sum of line segments is termed a zonotope. A zonoid is a Blaschke-Hausdorfflimit ofzonotopes. A projective metric d on a convex subset of projective space is shown to be of negative type if and only if the spheres in any tangent space are polar duals of zonoids. It follows that metri
## Abstract We recall the characterisation of positive definite polynomial functions over a real closed ring due to Dickmann, and give a new proof of this result, based upon ideas of Abraham Robinson. In addition we isolate the class of convexly ordered valuation rings for which this characterisati