泛Askey-Wilson代数与$(C_1^{\vee},C_1)$型DAHA
The Universal Askey-Wilson Algebra and DAHA of Type $(C_1^{\vee},C_1)$
摘要：
令$\mathbb F$表示字段，并且固定非零$q\in\mathbb F$，使得$q^4\not=1$。泛Askey-Wilson代数$Δ_q$是由生成元和关系以如下方式定义的结合$\mathbb F$ -代数。生成器是$A$、$B$、$C$。关系断言$A+\frac{qBC-q^{-1}CB}{q^2-q^{-2}}$、$B+\frac{qCA-q^{-1}AC}{q^2-q^{-2}}$、$C+\frac{qAB-q^{-1}BA}{q^2-q^{-2}}$中的每一个在$Δ_q$中是中心的。$(C_1^\vee,C_1)$型的泛DAHA $\hat H_q$是由生成元$\lbrace t^{\pm1}_i\rbrace_{i=0}^3$和关系（i）$t_i t^{-1}_i=t^{-1}_i t_i=1$ ;（ii）$t_i+t^{-1}_i$是中心的;（iii）$t_0t_1t_2t_3=q^{-1}$定义的结合$\mathbb F$ -代数。我们展示了发送$A\mapsto t_1t_0+(t_1t_0)^{-1}$、$B\mapsto t_3t_0+(t_3t_0)^{-1}$、$C\mapsto t_2t_0+(t_2t_0)^{-1}$的$\mathbb F$ -代数$ψ:Δ_q\to\hat H_q$的注入。对于映射$ψ$，我们计算上述三个中心元素的图像。代数$Δ_q$有另一个中心元素，称为Casimir元素$Ω$。我们在PDMATHBNG下计算PDMATHBNH的图像。我们描述了如何阿丁辫子群$B_3$作用于$Δ_q$和$\hat H_q$作为一组自同构。我们表明，$ψ$与这些$B_3$行动。得到了一些相关结果。
英文摘要：
Let $\mathbb F$ denote a field, and fix a nonzero $q\in\mathbb F$ such that $q^4\not=1$. The universal Askey-Wilson algebra $Δ_q$ is the associative $\mathbb F$-algebra defined by generators and relations in the following way. The generators are $A$, $B$, $C$. The relations assert that each of $A+\frac{qBC-q^{-1}CB}{q^2-q^{-2}}$, $B+\frac{qCA-q^{-1}AC}{q^2-q^{-2}}$, $C+\frac{qAB-q^{-1}BA}{q^2-q^{-2}}$ is central in $Δ_q$. The universal DAHA $\hat H_q$ of type $(C_1^\vee,C_1)$ is the associative $\mathbb F$-algebra defined by generators $\lbrace t^{\pm1}_i\rbrace_{i=0}^3$ and relations (i) $t_i t^{-1}_i=t^{-1}_i t_i=1$; (ii) $t_i+t^{-1}_i$ is central; (iii) $t_0t_1t_2t_3=q^{-1}$. We display an injection of $\mathbb F$-algebras $ψ:Δ_q\to\hat H_q$ that sends $A\mapsto t_1t_0+(t_1t_0)^{-1}$, $B\mapsto t_3t_0+(t_3t_0)^{-1}$, $C\mapsto t_2t_0+(t_2t_0)^{-1}$. For the map $ψ$ we compute the image of the three central elements mentioned above. The algebra $Δ_q$ has another central element of interest, called the Casimir element $Ω$. We compute the image of $Ω$ under $ψ$. We describe how the Artin braid group $B_3$ acts on $Δ_q$ and $\hat H_q$ as a group of automorphisms. We show that $ψ$ commutes with these $B_3$ actions. Some related results are obtained.
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