Leibniz algebras defined by tensor product of Lie algebras
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摘要: 讨论了李代数\,$\mathcal{G}$\,以及由这个李代数诱导的\$\mathrm{Leibniz}$\,代数\,$\mathcal{G}\otimes\mathcal{G}$\,的一些性质, 主要从不变双线性型和导子看这两个代数之间的差异, 证明了在特定条件下两者的不变双线性型维数是一致的. 为进一步确定李代数\,$\mathcal{G}$\,和\,$\mathcal{G}\otimes\mathcal{G}$\的差异, 讨论了由\,$\mathcal{G}\otimes\mathcal{G}$\,诱导的一类重要的李代数\,$\mathcal{G}\boxtimes\mathcal{G}$; 最后证明了, 如果\,$\mathcal{G}$\,是有限维半单李代数, $\mathcal{G}$\,和\,$\mathcal{G}\boxtimes\mathcal{G}$\,是同构的.Abstract: By the definition of $\mathrm{Leibniz}$ algebra, we showed that \ $\mathcal{G}\otimes\mathcal{G}$\ was a $\mathrm{Leibniz}$\ algebra when \ $\mathcal{G}$\ was a $ \mathrm{Lie}$ algebra. We also proved that $\mathcal{G}\otimes\mathcal{G}$\ and $\mathcal{G}$\ have the same dimension of invariant symmetric bilinear forms in a special case, and the dimension of the derivation algebra of\ $\mathcal{G}$\ is always less than that of $\mathcal{G}\otimes\mathcal{G}$. $\mathcal{G}\boxtimes\mathcal{G}$\ is one of the important \ $\mathrm{Lie}$\ algebra induced by $\mathcal{G}\otimes\mathcal{G}$, and $\mathcal{G}\boxtimes\mathcal{G}$\ is isomorphic to $\mathcal{G}$\ when $\mathcal{G}$\ is a finite dimensional semi-simple\ $\mathrm{Lie}$\ algebra.
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Key words:
- Leibniz algebra /
- invariant symmetric bilinear form /
- tensor product /
- derivation /
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