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math.RT2021
Koszul algebras and Donaldson-Thomas invariants
Vladimir Dotsenko, Evgeny Feigin, Markus Reineke
For a given symmetric quiver , we define a supercommutative quadratic algebra whose Poincaré series is related to the motivic generating function of by a sim…
math.RT2021
Totally nonnegative Grassmannians, Grassmann necklaces and quiver Grassmannians
Evgeny Feigin, Martina Lanini, Alexander Pütz
Postnikov constructed a cellular decomposition of the totally nonnegative Grassmannians. The poset of cells can be described (in particular) via Grassmann necklaces. We study certa…