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math.AG2026
Quasimap critical cohomology, Coulomb branches, and quantum groups
Tommaso Maria Botta, Spencer Tamagni
This article presents a systematic study of the critical cohomology of $\QM^ξ(\bbP^1, X)$, the moduli space of based quasimaps from $\bbP^1$ to a Nakajima quiver variety . We de…
math.AG2026
Quasimaps to Nakajima varieties as critical loci
Spencer Tamagni
is a Nakajima quiver variety. In this note we report the observation that the space parameterizing quasimaps from to , sending infinity to a given point, may…
math.AG2024
Nonabelian shift operators and shifted Yangians
Spencer Tamagni
We introduce nonabelian analogs of shift operators in the enumerative theory of quasimaps. We apply them on the one hand to strengthen the emerging analogy between enumerative geom…