Therefore, for every perfect Lie algebra L（E1,E2,E3） with v = 2, its uniersal central extension has the vertex operator represention.
于是，对于每一个perfect李代数L（E1，E2，E3），当v=2时它的泛中心扩张都存在顶点算子表示。
参考来源 - 一类无穷维李代数的结构和表示·2,447,543篇论文数据，部分数据来源于NoteExpress
最后确定了W及其泛中心扩张的自同构群的结构。
Finally, the structures of the automorphism groups of W and its universal central extension are characterized.
本文将应用广义限制李代数的概念来研究具有三角分解李代数的积分元和中心扩张的关系。
In this paper, we apply the concept of the generalized restricted Lie algebra to study the relation of the integral and central extensions of a Lie algebra with a triangular decomposition.
今天的牛津是一个繁忙的大城市，但市中心的古老大学建筑在很大程度上没有受到城市扩张的影响。
Today Oxford is a large, busy city, but the ancient university buildings in the centre have remained largely untouched by the urban expansion.
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