Elliptic Lie-algebra representation conjecture via Steinberg correspondences

From papers

Let RR be the relevant elliptic root system, let δE\delta_E and δpt\delta_{\mathrm{pt}} be the indicated imaginary-root classes, and let Zα+aδE+bδpt,γZ_{\alpha+a\delta_E+b\delta_{\mathrm{pt}},\gamma} be the Steinberg-correspondence cycles acting on the equivariant cohomology of the framed moduli spaces Mtf(v;OD)M^{tf}(v;\mathcal O_{D_\infty}). Let wγa,bw^{a,b}_\gamma and xαa,bx^{a,b}_\alpha denote the generators of the elliptic Lie algebra and let \hbar be the equivariant parameter. Elliptic representation conjecture. After a change of basis in the imaginary root spaces, the assignment

wγa,bvZaδE+bδpt,γ,w^{a,b}_\gamma\longmapsto\bigsqcup_v Z_{a\delta_E+b\delta_{\mathrm{pt}},\gamma}, xαa,bvZα+aδE+bδpt,αR{0},x^{a,b}_\alpha\longmapsto\bigsqcup_v Z_{\alpha+a\delta_E+b\delta_{\mathrm{pt}}},\qquad \alpha\in R\setminus\{0\},

defines a representation of gRC[]\mathfrak g_R\otimes\mathbb C[\hbar] on

vHT(Mtf(v;OD)).\bigoplus_v H^*_T(M^{tf}(v;\mathcal O_{D_\infty})).

This would extend the real- and imaginary-root convolution representations to the full elliptic Lie algebra; the supplied text gives no resolution.

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Sources & referencesView supporting material

Primary source

Samuel DeHority, “Toroidal analogues of the Grothendieck-Springer map”, arXiv:2311.00355 (2023).

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