On the exactness of Kostant-Kirillov form and the second cohomology of nilpotent orbits
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math.SG
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adjointcohomologyformkostant-kirillovnilpotentorbitssecondalgebras
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We give a criterion for the Kostant-Kirillov form on an adjoint orbit in a real semisimple Lie group to be exact. We explicitly compute the second cohomology of all the nilpotent adjoint orbits in every complex simple Lie algebras.
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