河北大学学报(自然科学版) ›› 2022, Vol. 42 ›› Issue (6): 561-564.DOI: 10.3969/j.issn.1000-1565.2022.06.001

• •    下一篇

李超代数P^~(2)到Kac模的一阶上同调

张子璐1,孙丽萍1,王淑娟2   

  • 收稿日期:2022-03-24 发布日期:2023-02-22
  • 通讯作者: 孙丽萍(1970—)
  • 作者简介:张子璐(1998—),女,河南平顶山人,哈尔滨理工大学在读硕士研究生,主要从事李超代数方向的研究.
    E-mail:2020900041@stu.hrbust.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(12061029);黑龙江省自然科学基金资助项目(A2015017;QC2018006)

First cohomology of Lie superalgebra P^~(2)with coefficients to Kac modules

ZHANG Zilu1, SUN Liping1, WANG Shujuan2   

  1. 1. College of Science, Harbin University of Science and Technology, Harbin 150080, China; 2. College of Arts and Sciences, Shanghai Maritime University, Shanghai 201306, China
  • Received:2022-03-24 Published:2023-02-22

摘要: 在p≥3的域上,根据P^~(2)的Z-阶化结构以及零阶化项P^~(2)0的标准Cartan分解,对于给定的权λ以及极大向量vλ,构作出有限维不可约P^~(2)0-模M(λ),进而给出其Kac结构.其次,利用一阶上同调的定义,将P^~(2)到其Kac模的一阶上同调转化为计算P^~(2)到Kac模的非内导子的权导子.最后,本文确定了P^~(2)到一类Kac模的一阶上同调.

关键词: Kac模, 导子, 上同调,

Abstract: Over a field of characteristic p≥3,firstly,according to the Z-degree structure of P^~(2)and the standard Cartan decomposition of the 0-degree P^~(2)0,for a given weight λ and the maximal vector vλ, finite-dimensional irreducible modules M(λ)of P^~(2)0 are constructed, and then its Kac structure is given. Secondly, using the definition of the first cohomology group, the first cohomology group from P^~(2)to its Kac module is transformed into the weight-derivation of the non-inner derivation of P^~(2)to Kac module. Finally, the first cohomology group of P^~(2)with coefficients to a class of Kac modules is determined.

Key words: Kac module, derivation, cohomology, weight

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