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A new explicit expression of the Contou-Carrère symbol

Author: Fernando Pablos Romo
Journal: Proc. Amer. Math. Soc. 135 (2007), 1977-1985
MSC (2000): Primary 19F15, 19C20.
Published electronically: February 28, 2007
MathSciNet review: 2299469
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Abstract: The aim of this note is to offer a new explicit expression of the Contou-Carrère symbol that depends only on a product of a finite number of terms. As an application, we obtain an explicit formula for a Witt Residue.

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Additional Information

Fernando Pablos Romo
Affiliation: Departamento de Matemáticas, Universidad de Salamanca, Plaza de la Merced 1-4, 37008 Salamanca, España

Keywords: Contou-Carr\`{e}re symbol, explicit expression, artinian local ring, Witt Residue
Received by editor(s): February 6, 2006
Received by editor(s) in revised form: February 23, 2006, and March 1, 2006
Published electronically: February 28, 2007
Additional Notes: This work was partially supported by the DGESYC research contract no. BFM2003-00078 and Castilla y León regional government contract SA071/04.
Communicated by: Wen-Ching Winnie Li
Article copyright: © Copyright 2007 American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication.

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