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arXiv · 2104.12336

$\imath$Hall algebra of Jordan quiver and $\imath$Hall-Littlewood functions

Ming Lu·Shiquan Ruan·Weiqiang Wang
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Abstract

We show that the $\imath$Hall algebra of the Jordan quiver is a polynomial ring in infinitely many generators and obtain transition relations among several generating sets. We establish a ring isomorphism from this $\imath$Hall algebra to the ring of symmetric functions in two parameters $t, \theta$, which maps the $\imath$Hall basis to a class of (modified) inhomogeneous Hall-Littlewood ($\imath$HL) functions. The (modified) $\imath$HL functions admit a formulation via raising and lowering operators. We formulate and prove Pieri rules for (modified) $\imath$HL functions. The modified $\imath$HL functions specialize at $\theta=0$ to the modified HL functions; they specialize at $\theta=1$ to the deformed universal characters of type C, which further specialize at $(t=0, \theta =1)$ to the universal characters of type C.

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BibTeXRIS

Ming Lu, Shiquan Ruan, Weiqiang Wang. 2021-04-26. $\imath$Hall algebra of Jordan quiver and $\imath$Hall-Littlewood functions. https://arxiv.org/abs/2104.12336

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