Hadamard spaces with isolated flats. (With an appendix written jointly with Mohamad Hindawi).
Hajós' theorem and the partition lemma.
Halbgruppen mit ausschließlich reesschen Linkskongruenzen.
Halbgruppen und Automaten
Halbringe mit ansteigender Kettenbedingung für Annullatorideale.
Half-automorphisms of transformation semigroups
Halfnets and partial -loops
Hall algebras
Hall pi-subgroups and conjugacy classes
Hall Subgroups with Cyclic Intersections.
Hamiltonian quasimodules and trimedial quasigroups
Harish-Chandra homomorphisms and symplectic reflection algebras for wreath-products
The main result of the paper is a natural construction of the spherical subalgebra in a symplectic reflection algebra associated with a wreath-product in terms of quantum hamiltonian reduction of an algebra of differential operators on a representation space of an extended Dynkin quiver. The existence of such a construction has been conjectured in [EG]. We also present a new approach to reflection functors and shift functors for generalized preprojective algebras and symplectic reflection algebras...
Harish-Chandra vertices.
Harmonic measures versus quasiconformal measures for hyperbolic groups
We establish a dimension formula for the harmonic measure of a finitely supported and symmetric random walk on a hyperbolic group. We also characterize random walks for which this dimension is maximal. Our approach is based on the Green metric, a metric which provides a geometric point of view on random walks and, in particular, which allows us to interpret harmonic measures as quasiconformal measures on the boundary of the group.
Hausdorff combing of groups and for universal covering spaces of closed 3-manifolds
H*(C/B,L) for G of semi-simple rank 2
Hecke algebras and characters of parabolic type of finite group with -pairs
Hecke algebras and hypergeometric functions.
Hecke algebras and shellings of Bruhat intervals
Hecke operators for GLₙ and buildings