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Effective lifting of 2-cocycles for Galois cohomology |
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| Authors: | Thomas Preu |
| Institution: | 1. Institut für Mathematik, Universit?t Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland |
| Abstract: | We give explicit formulas for reducing the problem of determining whether a given 2-cocycle is a coboundary and if so finding a lifting 1-cochain to a system of norm equations. |
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