Geometric description of the connecting homomorphism for Witt groups

Geometric description of the connecting homomorphism for Witt groups

We give a geometric setup in which the connecting homomorphism in the localization long exact sequence for Witt groups decomposes as the pull-back to the exceptional fiber of a suitable blow-up followed by a push-forward.

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Veröffentlicht in:Documenta mathematica Journal der Deutschen Mathematiker-Vereinigung. 2009, Vol.14, p.525-550
Hauptverfasser: Balmer, Paul, Calmès, Baptiste
Format: Artikel
Sprache:eng
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Beschreibung
Zusammenfassung:We give a geometric setup in which the connecting homomorphism in the localization long exact sequence for Witt groups decomposes as the pull-back to the exceptional fiber of a suitable blow-up followed by a push-forward.
ISSN:1431-0635
1431-0643
DOI:10.4171/dm/281