Search arXivSearch

arXiv · 1004.2349

Bases of the quantum cluster algebra of the Kronecker quiver

Abstract

We construct bar-invariant $\mathbb{Z}[q^{\pm 1/2}]-$bases of the quantum cluster algebra of the Kronecker quiver which are quantum analogues of the canonical basis, semicanonical basis and dual semicanonical basis of the cluster algebra of the Kronecker quiver in the sense of \cite{sherzel},\cite{calzel} and \cite{gls} respectively. As a byproduct, we prove the positivity of the elements in these bases.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Ming Ding, Fan Xu. 2010-04-26. Bases of the quantum cluster algebra of the Kronecker quiver. https://arxiv.org/abs/1004.2349

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

Categorification of $k$-Schur functions and refined Macdonald positivity

We establish a substantial part of the categorification framework for $k$-Schur functions proposed in Chen's Ph.D.\ thesis, written under the supervision of Mark Haiman. More precisely, we realize $k$-Schur functions as the graded characters of a distinguished family of objects in a certain module category and establish module-theoretic analogues of several foundational properties of $k$-Schur functions. A final part of Chen's framework predicts a homological characterization of modules admitting filtrations by these distinguished objects; we establish this characterization under an additional combinatorial hypothesis. In addition, we unconditionally prove that modules arising in this framework admit filtrations whose subquotients are affine Demazure modules of level $k$. As a consequence, modified Macdonald polynomials expand positively in the characters of affine Demazure modules. This may be viewed as a homological refinement of Macdonald positivity, arising from an intrinsic $\mathrm{ext}$-orthogonality condition on the corresponding Garsia--Haiman modules. We also prove the combinatorial hypothesis for $m \le 2k$ in the appendix and verify it computationally for $m\leq 19$, yielding $k$-Schur positivity of modified Macdonald polynomials in these cases. Our approach builds on our previous work on the algebraic and geometric realization of Catalan symmetric functions, a class encompassing both $k$-Schur and Hall--Littlewood functions.

math.RT

Big categorification on towers of classical groups and wreath product groups

We develop a uniform framework for ``big'' categorification of representation categories of towers of finite classical groups and wreath product groups. We construct actions of symmetric products of Heisenberg categories, quantum in the finite classical group case and degenerate in the wreath product case. These actions lead to categorical actions of suitable symmetric products of Kac--Moody 2-categories, and hence to actions of large Lie algebras on Grothendieck groups. In characteristic zero, the resulting actions control the full graded centers of the group algebras through diagrammatic central elements, and the associated colored weight functions separate all irreducible ordinary characters. We also obtain modular block descriptions for wreath product groups through categorification.

math.RT

Igusa--Todorov Algebras and the Auslander--Reiten Conjecture

We prove that every Igusa--Todorov Artin algebra satisfies the Auslander--Reiten conjecture. More precisely, let $V$ be an $n$-Igusa--Todorov witness, and let $t$ be the number of isomorphism classes of nonprojective indecomposable summands of $V$. If a finitely generated module $M$ satisfies $\Ext_A^i(M,A)=0$ for every $i>0$ and $\Ext_A^q(M,M)=0$ for $1\leq q\leq 2t+1$, then $M$ is projective. As applications, algebras of representation dimension at most three and algebras satisfying $J^{2m+1}=0$ for which $A/J^m$ has finite representation type satisfy the Auslander--Reiten conjecture.

math.RT