groups are almost convex and have a sub-cubic Dehn function.
L²-homology and reciprocity for right-angled Coxeter groups
Let W be a Coxeter group and let μ be an inner product on the group algebra ℝW. We say that μ is admissible if it satisfies the axioms for a Hilbert algebra structure. Any such inner product gives rise to a von Neumann algebra containing ℝW. Using these algebras and the corresponding von Neumann dimensions we define -Betti numbers and an -Euler charactersitic for W. We show that if the Davis complex for W is a generalized homology manifold, then these Betti numbers satisfy a version of Poincaré...
L2-Topological invariants of 3-manifolds.
La trace du noyau de la chaleur des variétés hyperboliques de dimension 3
Laminar branched surfaces in 3--manifolds.
Large embedded balls and Heegaard genus in negative curvature.
Le calcul des invariants des espaces lenticulaires
Le théorème de Van Kampen
Leafwise smoothing laminations.
Lefschetz fibrations, complex structures and Seifert fibrations on .
Lefschetz fibrations on compact Stein surfaces.
Lefschetz number and degree of a self-map
Legendrian and transverse twist knots
In 1997, Chekanov gave the first example of a Legendrian nonsimple knot type: the knot. Epstein, Fuchs, and Meyer extended his result by showing that there are at least different Legendrian representatives with maximal Thurston-Bennequin number of the twist knot with crossing number . In this paper we give a complete classification of Legendrian and transverse representatives of twist knots. In particular, we show that has exactly Legendrian representatives with maximal Thurston–Bennequin...
Legendrian graphs and quasipositive diagrams
In this paper we clarify the relationship between ribbon surfaces of Legendrian graphs and quasipositive diagrams by using certain fence diagrams. As an application, we give an alternative proof of a theorem concerning a relationship between quasipositive fiber surfaces and contact structures on . We also answer a question of L. Rudolph concerning moves of quasipositive diagrams.
Legendrian knots and monopoles.
Lengths of simple loops on surfaces with hyperbolic metrics.
Lens space surgeries and a conjecture of Goda and Teragaito.
Les cycles évanescents sont dénoués
Les invariants récents des variétés de dimension 3
Les invariants des 3-variétés périodiques
Soit un entier . Une 3-variété est dite -périodique si et seulement si le groupe cyclique agit semi-librement sur avec un cercle comme l’ensemble des points fixes. Dans cet article, nous utilisons les invariants quantiques pour établir des conditions nécessaires pour qu’une 3-variété soit périodique.