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On the nonabelian cohomology with coefficients in a crossed module
Group Theory · Submitted 12 Oct 2020
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In this paper we study several important objects that are classified by these cohomologies and for them we develop a theory similar to the Schreier obstruction theory of group extensions.
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The abstract, sentence by sentence
This paper is concerned with the nonabelian cohomology of groups with coefficients in crossed modules. These objects were introduced by Dedecker and studied by Breen, Borovoi, Noohi and many others. In this paper we study several important objects that are classified by these cohomologies and for them we develop a theory similar to the Schreier obstruction theory of group extensions.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | This paper is concerned with the nonabelian cohomology of groups with coefficients in crossed modules. | background 0.78 | 0.28 | 0.06 | asserted 0.97 |
| s1 | These objects were introduced by Dedecker and studied by Breen, Borovoi, Noohi and many others. | background 1.00 | 0.03 | 0.03 | asserted 1.00 |
| s2 | In this paper we study several important objects that are classified by these cohomologies and for them we develop a theory similar to the Schreier obstruction theory of group extensions. | contribution 1.00 | 0.93 | 0.35 | asserted 1.00 |
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The paper
Original abstract
This paper is concerned with the nonabelian cohomology of groups with coefficients in crossed modules. These objects were introduced by Dedecker and studied by Breen, Borovoi, Noohi and many others. In this paper we study several important objects that are classified by these cohomologies and for them we develop a theory similar to the Schreier obstruction theory of group extensions.
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See also [ref] .
On the Gottlieb group, Drinfeld centre and the centre of a crossed module · Relation to nonabelian cohomology · 0.84
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