4 papers
A Scattering Transform for Noncommutative Instantons
Spencer Tamagni
We give a detailed and mathematically rigorous analysis of the path integrals of chiral fermions supported on holomorphic curves on in a general noncommutative ins…
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…
Coulomb Branches in 3d Revisited
Spencer Tamagni
Using ideas from the gauge theory approach to the geometric Langlands program, we revisit supersymmetric localization with monopole operators in 3d supersymmetric…
Stable Envelopes, Vortex Moduli Spaces, and Verma Modules
Spencer Tamagni
We explicitly construct K-theoretic and elliptic stable envelopes for certain moduli spaces of vortices, and apply this to enumerative geometry of rational curves in these varietie…