Borel subalgebras of Cartan Type Lie Algebras

Abstract

Let $W(n)$ be Jacobson-Witt algebra over algebraic closed field $\mathbb{K}$ with positive characteristic $p>2.$ It is difficult to classify all Borel subalgebras of $W(n)$ or non-classical restricted simple Lie algebras. The present paper and \cite{S7} study two kinds of subalgebras which are easily to understand and highly related to Borel subalgebras. In \cite{S7}, the last author investigates a class of special Borel subalgebras of $W(n)$ which is called homogeneous Borel subalgebras. The present paper focuses on subalgebras of $W(n)$ which are related to Borel subalgebras such that firstly, they could be trigonalizable; and secondly, they essentially belong to the ones investigated in \cite{S7}. In this paper, the conjugation classes of these subalgebras and representative for each class will be determined. Then some properties such as filtration and dimension will be investigated.

10 pages