$B_2$-crystals: axioms, structure, models
$d$-Koszul algebras, 2-$d$ determined algebras and 2-$d$-Koszul algebras
$EE_8$-lattices and dihedral groups
$G$-complete reducibility and semisimple modules
$G$-stable pieces and Lusztig's dimension estimates
$G$-stable pieces and partial flag varieties
$H^*$-algebras and quantization of para-Hermitian spaces
$m$-cluster categories and $m$-replicated algebras
$q$-Inverting pairs of linear transformations and the $q$-tetrahedron algebra
$R$--groups and elliptic representations for similitude groups
$W$-graph versions of tensoring with the $§_n$ defining representation
$\mathcal{C}$-filtered modules and proper costratifying systems