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Part III, Free Actions of Compact Quantum Groups on $\mathrm{C}^*$-Algebras
Symmetry, integrability and geometry: methods and applications, Tome 13 (2017) Cet article a éte moissonné depuis la source Math-Net.Ru

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We study and classify free actions of compact quantum groups on unital $\mathrm{C}^*$-algebras in terms of generalized factor systems. Moreover, we use these factor systems to show that all finite coverings of irrational rotation $\mathrm{C}^*$-algebras are cleft.
Keywords: free action; $\mathrm{C}^*$-algebra; quantum group; factor system; finite covering. 
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     author = {Kay Schwieger and Stefan Wagner},
     title = {Part~III, {Free} {Actions} of {Compact} {Quantum} {Groups} on $\mathrm{C}^*${-Algebras}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2017},
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2017_13_a61/}
}
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Kay Schwieger; Stefan Wagner. Part III, Free Actions of Compact Quantum Groups on $\mathrm{C}^*$-Algebras. Symmetry, integrability and geometry: methods and applications, Tome 13 (2017). http://geodesic.mathdoc.fr/item/SIGMA_2017_13_a61/

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