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arXiv 1909.08320math.RAmath.RT
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结合Rota-Baxter算子的变形

Deformations of associative Rota-Baxter operators

Apurba Das

摘要:

结合代数上的Rota-Baxter算子和更一般的$\mathcal{O}$ -算子在概率论、组合学、结合杨-巴克斯特方程和代数分裂中有重要的应用。利用Uchino方法,构造了一个显式分次李代数,其Maurer-Cartan元由$\mathcal{O}$ -算子给出.这使我们能够构造一个$\mathcal{O}$ -算子的上同调。这个上同调也可以看作是具有适当表示的系数的某个代数的Hochschild上同调。接下来,我们研究线性和正式变形的$\mathcal{O}$ -运营商是由上述定义的上同调。我们引入Nijenhuis元素与一个$\mathcal{O}$ -运营商引起平凡的变形。作为应用,我们得到了权为零的Rota-Baxter算子和结合{ \bf r}-矩阵的变形.

英文摘要:

Rota-Baxter operators and more generally $\mathcal{O}$-operators on associative algebras are important in probability, combinatorics, associative Yang-Baxter equation and splitting of algebras. Using a method of Uchino, we construct an explicit graded Lie algebra whose Maurer-Cartan elements are given by $\mathcal{O}$-operators. This allows us to construct a cohomology for an $\mathcal{O}$-operator. This cohomology can also be seen as the Hochschild cohomology of a certain algebra with coefficients in a suitable representation. Next, we study linear and formal deformations of an $\mathcal{O}$-operator which are governed by the above-defined cohomology. We introduce Nijenhuis elements associated with an $\mathcal{O}$-operator which give rise to trivial deformations. As an application, we conclude deformations of weight zero Rota-Baxter operators and associative {\bf r}-matrices.

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