Karoubi's relative Chern character and Beilinson's regulator

Tamme, Georg

doi:10.24033/asens.2174

Karoubi's relative Chern character and Beilinson's regulator
[Le caractère de Chern relatif de Karoubi et le régulateur de Beilinson]

Tamme, Georg

Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 45 (2012) no. 4, pp. 601-636.

Résumé
Abstract

Nous construisons une variante du caractère de Chern relatif de Karoubi pour les variétés lisses sur $𝐂$ et prouvons un résultat de comparaison avec le régulateur de Beilinson à valeurs dans la cohomologie de Deligne-Beilinson. En corollaire, nous obtenons une nouvelle preuve du théorème de Burgos que, pour un corps de nombres, le régulateur de Beilinson est deux fois le régulateur de Borel.

We construct a variant of Karoubi’s relative Chern character for smooth varieties over $𝐂$ and prove a comparison result with Beilinson’s regulator with values in Deligne-Beilinson cohomology. As a corollary we obtain a new proof of Burgos’ Theorem that for number fields Borel’s regulator is twice Beilinson’s regulator.

MR Zbl

DOI : 10.24033/asens.2174

Classification : 19F27, 19D55, 14F43, 19E20, 19L10, 55R40, 57R20
Keywords: regulator, relative Chern character, secondary characteristic class, Borel regulator
Mot clés : régulateur, caractère de Chern relatif, classe caractéristique secondaire, régulateur de Borel

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     title = {Karoubi's relative {Chern} character and {Beilinson's} regulator},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
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     volume = {Ser. 4, 45},
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     year = {2012},
     doi = {10.24033/asens.2174},
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Tamme, Georg. Karoubi's relative Chern character and Beilinson's regulator. Annales scientifiques de l'École Normale Supérieure, Série 4, Tome 45 (2012) no. 4, pp. 601-636. doi : 10.24033/asens.2174. https://www.numdam.org/articles/10.24033/asens.2174/

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