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Motivic cohomology spectral sequence and Steenrod operations

Part of: (Co)homology theory Spectral sequences $K$-theory in geometry Operations and obstructions

Published online by Cambridge University Press:  24 June 2016

Serge Yagunov
Serge Yagunov*
Affiliation:
Steklov Mathematical Institute (St. Petersburg), Fontanka, 27, St. Petersburg, 191023, Russia Max-Planck-Institut für Mathematik, Vivatsgasse, 7, 53111, Bonn, Germany email yagunov@gmail.com
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Abstract

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For a prime number $p$, we show that differentials $d_{n}$ in the motivic cohomology spectral sequence with $p$-local coefficients vanish unless $p-1$ divides $n-1$. We obtain an explicit formula for the first non-trivial differential $d_{p}$, expressing it in terms of motivic Steenrod $p$-power operations and Bockstein maps. To this end, we compute the algebra of operations of weight $p-1$ with $p$-local coefficients. Finally, we construct examples of varieties having non-trivial differentials $d_{p}$ in their motivic cohomology spectral sequences.

Keywords

motivic cohomological operationsSteenrod algebramotivic cohomology spectral sequence

MSC classification

Primary: 14F42: Motivic cohomology; motivic homotopy theory 19E20: Relations with cohomology theories
Secondary: 55S10: Steenrod algebra 55T99: None of the above, but in this section
Type
Research Article
Information
Compositio Mathematica , Volume 152 , Issue 10 , October 2016 , pp. 2113 - 2133
Copyright
© The Author 2016 

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