Gysin maps in Balmer¿Witt theory

• Autores: Alexander Nenashev
• Localización: Journal of pure and applied algebra, ISSN 0022-4049, Vol. 211, Nº 1, 2007, págs. 203-221
• Idioma: inglés
• DOI: 10.1016/j.jpaa.2007.01.006
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• Resumen

  • We introduce twisted Thom operators and the deformation to the normal cone isomorphisms in the derived Witt theory. Using these ingredients, we define push-forward maps of Witt groups along closed embeddings of smooth varieties and prove their standard properties, the most delicate of which turns out to be the functoriality of such maps.