Abstract
Let U be the quantum group and f be the Lusztig’s algebra associated with a symmetrizable generalized Cartan matrix. The algebra f can be viewed as the positive part of U. Lusztig introduced some symmetries T i on U for all i ∈ I. Since T i (f) is not contained in f, Lusztig considered two subalgebras i f and i f of f for any i ∈ I, where i f={x ∈ f | T i (x) ∈ f} and \({^{i}\mathbf {f}}=\{x\in \mathbf {f}\,\,|\,\,T^{-1}_{i}(x)\in \mathbf {f}\}\). The restriction of T i on i f is also denoted by \(T_{i}:{_{i}\mathbf {f}}\rightarrow {^{i}\mathbf {f}}\). The geometric realization of f and its canonical basis are introduced by Lusztig via some semisimple complexes on the variety consisting of representations of the corresponding quiver. When the generalized Cartan matrix is symmetric, Xiao and Zhao gave geometric realizations of Lusztig’s symmetries in the sense of Lusztig. In this paper, we shall generalize this result and give geometric realizations of i f, i f and \(T_{i}:{_{i}\mathbf {f}}\rightarrow {^{i}\mathbf {f}}\) by using the language ’quiver with automorphism’ introduced by Lusztig.
Similar content being viewed by others
References
Beilinson, A., Bernstein, J., Deligne, P.: Faisceaux pervers. Astérisque, 100 (1982)
Bernstein, J., Lunts, V.: Equivariant Sheaves and Functors. Springer (1994)
Deng, B., Xiao, J.: Ringel-hall algebras and Lusztig’s symmetries. J. Algebra 255(2), 357–372 (2002)
Kato, S.: An algebraic study of extension algebras. arXiv:1207.4640 (2012)
Kato, S.: Poincaré-Birkhoff-Witt bases and Khovanov-Lauda-Rouquier algebras. Duke Math. J. 163(3), 619–663 (2014)
Kiehl, R., Weissauer, R.: Weil Conjectures, Perverse Sheaves and l’adic Fourier Transform, vol. 42. Springer (2001)
Lin, Z.: Lusztig’s geometric approach to Hall algebras. In: Representations of Finite Dimensional Algebras and Related Topics in Lie Theory and Geometry, pp 349–364. American Mathematical Society (2004)
Lusztig, G.: Quantum deformations of certain simple modules over enveloping algebras. Adv. Math. 70(2), 237–249 (1988)
Lusztig, G: Canonical bases arising from quantized enveloping algebras. J. Amer. Math. Soc., 447–498 (1990)
Lusztig, G.: Quantum groups at roots of 1. Geom. Dedicata 35(1), 89–113 (1990)
Lusztig, G: Quivers, perverse sheaves, and quantized enveloping algebras. J. Amer. Math. Soc., 365–421 (1991)
Lusztig, G.: Braid group action and canonical bases. Adv. Math. 122(2), 237–261 (1996)
Lusztig, G.: Canonical bases and Hall algebras. In: Representation Theories and Algebraic Geometry, pp 365–399. Springer (1998)
Lusztig, G.: Introduction to Quantum Groups. Springer (2010)
Ringel, C.M.: Hall algebras and quantum groups. Invent. Math. 101(1), 583–591 (1990)
Ringel, C.M.: PBW-bases of quantum groups. J. Reine Angew. Math. 470, 51–88 (1996)
Sevenhant, B., Van den Bergh, M.: On the double of the Hall algebra of a quiver. J. Algebra 221(1), 135–160 (1999)
Xiao, J., Yang, S.: BGP-reflection functors and Lusztig’s symmetries: a Ringel-Hall algebra approach to quantum groups. J. Algebra 241(1), 204–246 (2001)
Xiao, J., Zhao, M.: BGP-reflection functors and Lusztig’s symmetries of modified quantized enveloping algebras. Acta Math. Sin. 29(10), 1833–1856 (2013)
Xiao, J., Zhao, M.: Geometric realizations of Lusztig’s symmetries. To appear in J Algebra (2017)
Author information
Authors and Affiliations
Corresponding author
Additional information
Presented by Michel Van den Bergh.
This work was supported by the National Natural Science Foundation of China [grant numbers 11526037,11501032]
Rights and permissions
About this article
Cite this article
Zhao, M. Geometric Realizations of Lusztig’s Symmetries of Symmetrizable Quantum Groups. Algebr Represent Theor 20, 923–950 (2017). https://doi.org/10.1007/s10468-017-9669-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10468-017-9669-0