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苏育才, 徐晓平
中国科学(A辑),2003,33(6):570~586,-0001,():
-1年11月30日
确定了特征0的代数闭域上与局部有限导子相关的中心单Poisson代数的结构。这些Poisson代数的Lie代数结构一般来说不是有限阶化的。
Posson 代数 局部有限算子 导子 有限阶化 同构类
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【期刊论文】Derivation-Simple Algebras and the Structures of Lie Algebras of Witt Type
苏育才, Yucai Su Xiaoping Xu Hechun Zhang
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-1年11月30日
We classify all the pairs of a commutative associative algebra with an identity element and its finite-dimensional locally finite Abelian derivation subalgebra such that the commutative associative algebra is derivation-simple with respect to the derivation subalgebra over an algebraically closed field with characteristic 0. Such pairs are the fundamental ingredients for constructing simple Lie algebras of Cartan type. Moreover, we determine the isomorphism classes of the simple Lie algebras of Witt type. The structure space of these algebras is given explicitly.
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【期刊论文】Low dimensional cohomology of general conformal algebras gcN
苏育才, Yucai Su a)
J. Math. Phys., Vol. 45, No.1, January 2004,-0001,():
-1年11月30日
We compute the low dimensional cohomologies H q(gcN,C), Hq(gcN,C) of the infinite rank general Lie conformal algebras gcN with trivial coefficients for q<3, N51 or q<2, N>2. We also prove that the cohomology of gcN with coeffi-cients in its natural module is trivial, i.e., H*(gcN,C[э]N)=0, and thus partially solve an open problem of Bakalov-Kac-Voronov
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苏育才, Yucai Su
Canad. J. Math. Vol. 55 (4), 2003 pp. 856-896,-0001,():
-1年11月30日
Xu introduced a class of nongraded Hamiltonian Lie algebras. These Lie algebras have a Poisson bracket structure. In this paper, the isomorphism classes of these Lie algebras are determined by employing a "sandwich" method and by studying some features of these Lie algebras. It is obtained that two Hamiltonian Lie algebras are isomorphic if and only if their corresponding Poisson algebras are isomorphic. Furthermore, the derivation algebras and the second cohomology groups are determined.
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【期刊论文】Quasifinite representations of a family of Lie algebras of Block type ☆
苏育才, Yucai Su a a, b, *
Journal of Pure and Applied Algebra 192(2004)293-305,-0001,():
-1年11月30日
To any nonzero additive subgroup G of an algebraically closed %eld F of characteristic zero and s=0; 1, there corresponds a Lie algebra B(s;G) of Block type, with basis {xa; i|a ∈G, i ∈ Z+}, and relation [xa; i; xb; j]=s(b−a)xa+b; i+j +((a−1+s)j−(b−1+s)i)xa+b; i+j−1. In this paper, it is proved that B(s;G) has a nontrivial quasi%nite module if and only if s =1 and G is isomorphic to Z, and that a quasi%nite B(1; Z)-module is a highest or lowest weight module. Furthermore, the quasi%nite irreducible highest weight B(1; Z)-modules are classi%ed and the unitary ones are proved to be trivial.
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