# A cellular algebra with specific decomposition of the unity

## TL;DR

This paper investigates the structure of cellular algebras with a specific idempotent decomposition, revealing their Loewy structure and block theory through the representation theory of subalgebras.

## Contribution

It provides a detailed description of the Loewy structure and block theory of cellular algebras using their idempotent decomposition and subalgebra representations.

## Key findings

- Complete Loewy structure of cell modules determined
- Block structure analyzed via subalgebra representation theory
- Decomposition approach simplifies cellular algebra analysis

## Abstract

Let $ \mathbb{A}$ be a cellular algebra over a field $\mathbb{F}$ with a decomposition of the identity $ 1_{\mathbb{A}} $ into orthogonal idempotents $ e_i$, $i \in I$ (for some finite set $I$) satisfying some properties. We describe the entire Loewy structure of cell modules of the algebra $ \mathbb{A} $ by using the representation theory of the algebra $ e_i \mathbb{A} e_i $ for each $ i $. Moreover, we also study the block theory of $\mathbb{A}$ by using this decomposition.