# Lie algebras simple with respect to a Taft algebra action

## TL;DR

This paper classifies finite-dimensional Lie algebras that are simple under the action of a Taft algebra and shows that their polynomial identity codimension growth aligns with their dimension, confirming an analog of Amitsur's conjecture.

## Contribution

It provides a classification of $H_{m^2}(zeta)$-simple Lie algebras and proves the growth rate of their polynomial identities matches their dimension, confirming an analog of Amitsur's conjecture.

## Key findings

- Classification of $H_{m^2}(zeta)$-simple Lie algebras over algebraically closed fields.
- The codimension sequence growth rate equals the algebra's dimension.
- Confirmation that the analog of Amitsur's conjecture holds for these algebras.

## Abstract

We classify finite dimensional $H_{m^2}(\zeta)$-simple $H_{m^2}(\zeta)$-module Lie algebras $L$ over an algebraically closed field of characteristic $0$ where $H_{m^2}(\zeta)$ is the $m$th Taft algebra. As an application, we show that despite the fact that $L$ can be non-semisimple in ordinary sense, $\lim_{n\to\infty}\sqrt[n]{c_n^{H_{m^2}(\zeta)}(L)} = \dim L$ where $c_n^{H_{m^2}(\zeta)}(L)$ is the codimension sequence of polynomial $H_{m^2}(\zeta)$-identities of $L$. In particular, the analog of Amitsur's conjecture holds for $c_n^{H_{m^2}(\zeta)}(L)$.