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arxiv: 2301.02899 · v3 · pith:3VU4LTWBnew · submitted 2023-01-07 · 🧮 math.AG

Burnside rings and volume forms with logarithmic poles

classification 🧮 math.AG
keywords burnsidenousvolumebirationalformshomomorphismhomomorphismeinvariant
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We develop a theory of Burnside rings in the context of birational equivalences of algebraic varieties equipped with logarithmic volume forms. We introduce a residue homomorphism and construct an additive invariant of birational morphisms. We also define a specialization homomorphism. -- Nous proposons une th\'eorie d'anneaux de Burnside dans le contexte de la g\'eom\'etrie birationnelle des vari\'et\'es alg\'ebriques munies d'une forme volume \`a p\^oles logarithmiques. Nous introduisons un homomorphisme {\guillemotleft} r\'esidu {\guillemotright}, construisons un invariant additif des morphismes birationnels. Nous d\'efinissons aussi un homomorphisme de sp\'ecialisation.

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