Surgery and duality.
Surgery and involutions on 4-manifolds.
Surgery formulae for Casson's invariant and extensions to homology lens spaces.
Surgery in cusp neighborhoods and the geography of irreducible 4-manifolds.
Surgery on Double Knots and Symmetries.
Sweepouts of amalgamated 3-manifolds.
Symmetric, cyclic, and permutation products of manifolds [Book]
Symmetric invariants and cohomology of groups.
Symmetries, isometries and length spectra of closed hyperbolic three-manifolds.
Symmetries of Nonelliptic Montesinos Links.
Symplectic geometry and the relative Donaldson invariants of CP2.
Symplectic Lefschetz fibrations on .
Tameness on the boundary and Ahlfors' measure conjecture
Let N be a complete hyperbolic 3-manifold that is an algebraic limit of geometrically finite hyperbolic 3-manifolds. We show N is homeomorphic to the interior of a compact 3-manifold, or tame, if one of the following conditions holds: 1. N has non-empty conformal boundary, 2. N is not homotopy equivalent to a compression body, or 3. N is a strong limit of geometrically finite manifolds. The first case proves Ahlfors’ measure conjecture for kleinian groups in the closure of the geometrically finite...
Tangential homotopy equivalences.
Taut foliations of 3-manifolds and suspensions of
Let be a compact oriented 3-manifold whose boundary contains a single torus and let be a taut foliation on whose restriction to has a Reeb component. The main technical result of the paper, asserts that if is obtained by Dehn filling along any curve not parallel to the Reeb component, then has a taut foliation.
Taut ideal triangulations of 3-manifolds.
Teorema de Gauss-Bonnet para fíbrados de Seifert.
Tetrahedra on deformed spheres and integral group cohomology.
The 3-manifold invariants of Witten and Reshetikhin-Turaev for sl (2, C).
The abelianization of the Johnson kernel
We prove that the first complex homology of the Johnson subgroup of the Torelli group is a non-trivial, unipotent -module for all and give an explicit presentation of it as a -module when . We do this by proving that, for a finitely generated group satisfying an assumption close to formality, the triviality of the restricted characteristic variety implies that the first homology of its Johnson kernel is a nilpotent module over the corresponding Laurent polynomial ring, isomorphic to the...