61 citations · 438 across the 47 of their papers we have counts for
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math.AT2012★ 3 cited
Deligne groupoid revisited
Paul Bressler, Alexander Gorokhovsky, Ryszard Nest +1
We show that for a differential graded Lie algebra whose components vanish in degrees below -1 the nerve of the Deligne 2-groupoid is homotopy equivalent to the simp…
math.KT2012
A transformation rule for the index of commuting operators
Jens Kaad, Ryszard Nest
In the setting of several commuting operators on a Hilbert space one defines the notions of invertibility and Fredholmness in terms of the associated Koszul complex. The index prob…
math-ph2012★ 4 cited
Uniqueness of the Momentum map
Chiara Esposito, Ryszard Nest
We give a detailed discussion about existence and uniqueness of Lu's momentum map. More precisely, we introduce the infinitesimal momentum map, and we study its properties. This al…