Hermitian Forms over Ordered ∗ -Fields
✍ Scribed by Thomas C Craven; Tara L Smith
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 152 KB
- Volume
- 216
- Category
- Article
- ISSN
- 0021-8693
No coin nor oath required. For personal study only.
✦ Synopsis
Let D be a division ring with an involution. Assuming that D admits Baer orderings, we can study the Witt group of Hermitian forms over D by observing its image in the ring of continuous functions on the space of orderings. We are led to define a new class of rings which, when viewed in an abstract setting, provide a natural generalization of the spaces of orderings and real spectra studied in real algebraic geometry.
📜 SIMILAR VOLUMES
Some geometry of Hermitian matrices of order three over GF(q 2 ) is studied. The variety coming from rank 2 matrices is a cubic hypersurface M 3 7 of PG(8, q) whose singular points form a variety H corresponding to all rank 1 Hermitian matrices. Beside M 3 7 turns out to be the secant variety of H.
In this paper we prove that the polynomial identities of the matrix algebra of order 2 over an infinite field of characteristic p / 2 admit a finite basis. We exhibit a finite basis consisting of four identities, and in ''almost'' all cases for p we describe a minimal basis consisting of two identit