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Butterflies I: Morphisms of 2-group stacks |
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| Authors: | Ettore Aldrovandi Behrang Noohi |
| Affiliation: | a Department of Mathematics, Florida State University, 1017 Academic Way, Tallahassee, FL 32306-4510, USA b Department of Mathematics, King's College London, Strand, London WC2R 2LS, United Kingdom |
| Abstract: | |
| Keywords: | 2-group gr-stack Crossed module Weak morphism Butterfly Non-abelian cohomology |
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