Geodesic
Cohomology of arbitrary spin currents in $\mathrm{AdS}_3$
Teoretičeskaâ i matematičeskaâ fizika, Tome 123 (2000) no. 1, pp. 3-25 
M. A. Vasiliev; S. F. Prokushkin. Cohomology of arbitrary spin currents in $\mathrm{AdS}_3$. Teoretičeskaâ i matematičeskaâ fizika, Tome 123 (2000) no. 1, pp. 3-25. http://geodesic.mathdoc.fr/item/TMF_2000_123_1_a0/
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     title = {Cohomology of arbitrary spin currents in $\mathrm{AdS}_3$},
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     volume = {123},
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     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_123_1_a0/}
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Voir la notice de l'article provenant de la source Math-Net.Ru

We study conserved currents of any integer or half-integer spin built from massless scalar and spinor fields in $\mathrm{AdS}_3$. We show that 2-forms dual to the conserved currents in $\mathrm{AdS}_3$ are exact in the class of infinite expansions in higher derivatives of the matter fields with the coefficients containing inverse powers of the cosmological constant. This property has no analogue in the flat space and may be related to the holography of the AdS spaces. “Improvements” to the physical currents are described as the trivial local current cohomology class. A complex $(T^s,\mathcal D)$ of spin-$s$ currents is defined, and the cohomology group $H^1(T^s,\mathcal D)=\mathbb C^{2s+1}$ is found.

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