Logan Abounader

The prime graph complements of $\mathcal{A}_{11}$- and $\mathcal{A}_{13}$-solvable groups

We study prime graph complements of $\mathcal{A}_n$-solvable groups, focusing on the cases $\mathcal{A}_{11}$ and $\mathcal{A}_{13}$. These provide the first classifications of $T$-solvable groups for which $|π(T)|>4$. We develop structural and representation-theoretic tools for analyzing the possible prime graph complements and use them to obtain complete characterizations for both $\mathcal{A}_{11}$-solvable and $\mathcal{A}_{13}$-solvable groups. The methods introduced also provide a framework for studying analogous classification problems for larger alternating groups.