publication venue for Kazhdan-Lusztig cells of a-value 2 in a(2)-finite Coxeter systems 2023 The structure of normal lattice supercharacter theories 2020 Classification of Coxeter groups with finitely many elements of a-value 2 2020 Supercharacter theories of type; ; A; ; unipotent radicals and unipotent polytopes 2018