O. Schiffmann

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math.RT2024

The Langlands formula and perverse sheaves

Mikhail Kapranov, Vadim Schechtman, Olivier Schiffmann +1

For a complex reductive Lie algebra $g$ with Cartan subalgebra $h$ and Weyl group $W$ we consider the category $Perv (W \ h)$ of per…

math.RT2024

Shuffle algebras for quivers as quantum groups

Andrei NeguÅ£, Francesco Sala, Olivier Schiffmann

We define a quantum loop group $U_{Q}^{+}$ associated to an arbitrary quiver $Q = (I, E)$ and maximal set of deformation parameters, with generators indexed by $I \times \mathbb{…