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arXiv 1502.02770math.QAmath-phmath.MPmath.RA
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一类共形李代数的中心扩张与共形导子

Central extensions and conformal derivations of a class of Lie conformal algebras

Yanyong Hong

摘要:

二次李共形代数对应于\cite{GD}中的一个Hamilton对,它在完全可积系统中起着基础性的作用.此外,它还对应于李代数与Novikov代数的某些相容对,而Novikov代数在\cite{X1}中被徐文称为Gel'fand-Dorfman双代数.利用Gel'fand-Dorfman双代数研究了二次共形李代数的中心扩张与共形导子。证明了二次共形李代数的中心扩张和共形导子分别与相应的Gel'fand-Dorfman双代数的某些双线性型和某些算子有关.

英文摘要:

A quadratic Lie conformal algebra corresponds to a Hamiltonian pair in \cite{GD}, which plays fundamental roles in completely integrable systems. Moreover, it also corresponds to certain compatible pairs of a Lie algebra and a Novikov algebra which was called Gel'fand-Dorfman bialgebra by Xu in \cite{X1}. In this paper, central extensions and conformal derivations of quadratic Lie conformal algebras are studied in terms of Gel'fand-Dorfman bialgebras. It is shown that central extensions and conformal derivations of a quadratic Lie conformal algebra are related with some bilinear forms and some operators of the corresponding Gel'fand-Dorfman bialgebra respectively.

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