All Title Author
Keywords Abstract

Mathematics  1996 

Topology of Conic Bundles - II

Full-Text   Cite this paper   Add to My Lib

Abstract:

For conic bundles on a smooth variety (over a field of characteristic $\ne 2$) which degenerate into pairs of distinct lines over geometric points of a smooth divisor, we prove a theorem which relates the Brauer class of the non-degenerate conic on the complement of the divisor to the covering class (Kummer class) of the 2-sheeted cover of the divisor defined by the degenerate conic, via the Gysin homomorphism in etale cohomology. This theorem is the algebro-geometric analogue of a topological result proved earlier.

Full-Text

comments powered by Disqus