On the Hasse principle for zero-cycles on Severi-Brauer fibrations

Details On the Hasse principle for zero-cycles on Severi-Brauer fibrations On the Hasse principle for zero-cycles on Severi-Brauer fibrations

2005-05-13

arxiv.org/abs/math/0505294v2

Mathematics

Classical Analysis and ODEs

9 pages

Scientific paper

The Abstract for this revised version is the following: Let k be a number field, let C be a smooth, projective and geometrically integral k-curve and let p:X --> C be a Severi-Brauer k-fibration of squarefree index. Various authors have studied the cokernel of the natural map CH_{0}(X/C)-->\bigoplus_{v}CH_{0}(X_{v}/C_{v}), where CH_{0}(X/C) is the kernel of p_{*}:CH_{0}(X)-->CH_{0}(C). In this paper I obtain an exact sequence which relates the Tate-Shafarevich group of the kernel of the above map to the Tate-Shafarevich group of the Neron-Severi torus of X. I then obtain conditions under which these two groups agree.

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