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arXiv 2108.12895math.RTmath-phmath.AGmath.MP
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矩阵的李代数的顶点算子表示

On the Vertex Operator Representation of Lie Algebras of Matrices

Ommolbanin Behzad, André Contiero, David Martins

摘要:

$r$不定式中的多项式环$B_r:=\mathbb{Q}[e_1,\ldots,e_r]$是$\mathbb{Q}[X]$的所有自同态的李代数的表示,其中除了n个$j$之外,所有自同态都在$X^j$处为零。我们确定了一个$B_r$值形式幂级数在$r+2$未定式中,它编码了$B_r$的所有基元在$\mathbb{Q}[X]$的初等自同态的生成函数作用下的象,我们称之为表示的结构级数.得到的表达式暗示(和改进)的公式Gatto和Salehyan,它只计算,为一个选定的基元素,其图像的生成函数。为了完整起见,我们在最后一节中构造$B=B_\infty$值结构形式幂级数,其中包括描述$gl_{\infty}(\mathbb{Q})$的玻色子表示的顶点算子对$B$的标准Schur基的生成函数的评价。这提供了另一种描述的玻色子表示的$gl_{\infty}$由于日期,金宝,Kashiwara和Miwa不涉及显式指数的微分算子。

英文摘要:

The polynomial ring $B_r:=\mathbb{Q}[e_1,\ldots,e_r]$ in $r$ indeterminates is a representation of the Lie algebra of all the endomorphism of $\mathbb{Q}[X]$ vanishing at powers $X^j$ for all but finitely many $j$. We determine a $B_r$-valued formal power series in $r+2$ indeterminates which encode the images of all the basis elements of $B_r$ under the action of the generating function of elementary endomorphisms of $\mathbb{Q}[X]$, which we call the structural series of the representation. The obtained expression implies (and improves) a formula by Gatto & Salehyan, which only computes, for one chosen basis element, the generating function of its images. For sake of completeness we construct in the last section the $B=B_\infty$-valued structural formal power series which consists in the evaluation of the vertex operator describing the bosonic representation of $gl_{\infty}(\mathbb{Q})$ against the generating function of the standard Schur basis of $B$. This provide an alternative description of the bosonic representation of $gl_{\infty}$ due to Date, Jimbo, Kashiwara and Miwa which does not involve explicitly exponential of differential operators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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