徐 坤,高壽蘭
(1.同濟(jì)大學(xué)數(shù)學(xué)系,上海200092;2.湖州師范學(xué)院理學(xué)院,浙江湖州313000)
一類扭形變Schr?dinger-Virasoro李代數(shù)的自同構(gòu)群
徐坤1,高壽蘭2
(1.同濟(jì)大學(xué)數(shù)學(xué)系,上海200092;2.湖州師范學(xué)院理學(xué)院,浙江湖州313000)
摘要:對(duì)一類帶有兩個(gè)參數(shù)的扭形變Schr?dinger-Virasoro李代數(shù)Lλ,μ進(jìn)行了研究.計(jì)算了當(dāng)?shù)囊痪S中心擴(kuò)張的自同構(gòu),并討論了某些特殊的自同構(gòu)生成的子群之間的關(guān)系,最后確定了?λ,μ的自同構(gòu)群Aut?λ,μ)的結(jié)構(gòu).
關(guān)鍵詞:Virasoro李代數(shù);扭形變Schr?dinger-Virasoro李代數(shù);自同構(gòu)
無限維李代數(shù)的結(jié)構(gòu)理論與表示理論在數(shù)學(xué)物理上具有非常重要的作用.在統(tǒng)計(jì)物理的背景下文獻(xiàn)[1-2]分別引入了Schr?dinger-Virasoro李代數(shù)及其形變.隨后出現(xiàn)了一系列與之相關(guān)的研究工作.例如,文獻(xiàn)[3]確定了Schr?dinger-Virasoro李代數(shù)的自同構(gòu)群;文獻(xiàn)[4]給出了擴(kuò)張情形下的Schr?dinger-Virasoro李代數(shù)的導(dǎo)子代數(shù),中心擴(kuò)張和自同構(gòu)群;文獻(xiàn)[5]討論了扭形變Schr?dinger-Virasoro李代數(shù)的導(dǎo)子代數(shù)和自同構(gòu)群.
特別地,文獻(xiàn)[6]討論了扭形變Schr?dinger-Virasoro李代數(shù)Lλ,μ的二上同調(diào)群. Lλ,μ是復(fù)數(shù)域C上的線性空間,有一組基,對(duì)任意的m,n∈Z,滿足下列李運(yùn)算:
其余為零.文獻(xiàn)[6]得到了下列結(jié)論:
本文中,用Z,C和C?分別表示整數(shù)集、復(fù)數(shù)集和非零復(fù)數(shù)集,所有的向量空間都是在復(fù)數(shù)域C上.
參考文獻(xiàn):
[1]HENKEL M. Schr?dinger invariance and strongly anisotropic critical systems[J]. J Stat phys, 1994, 75:1023-1029.
[2]ROGER C, UNTERBERGER J. The Schr?dinger-Virasoro Lie Group and Algebra:Representation Theory and Cohomological Study [J]. Annales Henri Poincaré, 2006, 7(7-8):1477-1529.
[3]GAO S L. The Automorphism Group of the Schr?dinger-Virasoro Lie Algebra[J]. Journal of Huzhou Teachers College, 2010, 32 (1):6-10.
[4]GAO S L, JIANG C P, PEI Y F. Structure of the Extended Schr?dinger-Virasoro Lie Algebra[J]. Algebra Colloq, 2009, 16(4):549-566.
[5]WANG W, LI J, XU Y. Derivations and automorphisms of twisted deformative Schr?dinger-Virasoro Lie algebras[J]. Communication in algebra, 2012, 40:3365-3388.
[6]LI J B. 2-Cocyles of Twisted Deformative Schr?dinger-Virasoro Algebras[J]. Communications in Algebra, 2012, 40(6):1933-1950.
[7]GAO S. The structure and representations of Schr?dinger-Virasoro algebra and non-graded Virasoro-like Lie algebras[D]. Shanghai:Shanghai Jiaotong University, 2008.
The Automorphism Group of a Class of Twisted Deformative Schr?dinger-Virasoro Lie Algebra
XU Kun1, GAO Shoulan2
(1. Department of Mathematics, Tongji University, Shanghai 200092, China;2. School of Science, Huzhou University, Huzhou 313000, China)
Abstract:In this paper,the authors mainly study the twisted deformative Schrodinger-Virasoro Lie algebra Lλ,μwith two parameters. The automorphisms of one dimensional center extension offor λ∈C,μis calculated and the relationships between certain subgroups generated by several special automorphisms are discussed. Finally, the structure of the automorphism groupis characterized.
Key words:Virasoro algebra;twisted deformative Schr?dinger-Virasoro algebra;automorphism
中圖分類號(hào):O152.5
文獻(xiàn)標(biāo)識(shí)碼:A
文章編號(hào):1008-2794(2016)02-0079-07
收稿日期:2015-09-20
基金項(xiàng)目:國(guó)家自然科學(xué)基金“共型流李代數(shù)的結(jié)構(gòu)與表示”(11201141);國(guó)家自然科學(xué)基金“幾類無限維李代數(shù)與超共形代數(shù)的研究”(11371134);浙江省自然科學(xué)基金“無限維李代數(shù)與頂點(diǎn)算子(超)代數(shù)的結(jié)構(gòu)與表示”(LQ12A01005);浙江省自然科學(xué)基金“無限維李代數(shù)、李偽代數(shù)與共形代數(shù)的研究”(LZ14A010001)
通信作者:徐坤,碩士研究生,研究方向:李代數(shù),E-mail:1531948@#edu.cn.