Irreducible Almost Simple Subgroups of Classical Algebraic Groups

Let $G$ be a simple classical algebraic group over an algebraically closed field $K$ of characteristic $p\geq 0$ with natural module $W$. Let $H$ be a closed subgroup of $G$ and let $V$ be a nontrivial $p$-restricted irreducible tensor indecomposable rational $KG$-module such that the restriction of $V$ to $H$ is irreducible.In this paper the authors classify the triples $(G,H,V)$ of this form, where $V \neq W,W^{*}$ and $H$ is a disconnected almost simple positive-dimensional closed subgroup of $G$ acting irreducibly on $W$. Moreover, by combining this result with earlier work, they complete the classification of the irreducible triples $(G,H,V)$ where $G$ is a simple algebraic group over $K$, and $H$ is a maximal closed subgroup of positive dimension.

Timothy C. Burness, University of Bristol, United Kingdom.Soumaia Ghandour, Lebanese University, Nabatieh, Lebanon.Claude Marion, University of Fribourg, Switzerland.Donna M. Testerman, Ecole Polytechnique Federale de Lausanne, Switzerland.