Discrete -groups with a parabolic generator.
Discrete Morse inequalities on infinite graphs.
Discrete Morse theory and graph braid groups.
Discrete thickness
We investigate the relationship between a discrete version of thickness and its smooth counterpart. These discrete energies are deffned on equilateral polygons with n vertices. It will turn out that the smooth ropelength, which is the scale invariant quotient of length divided by thickness, is the Γ-limit of the discrete ropelength for n → ∞, regarding the topology induced by the Sobolev norm ‖ · ‖ W1,∞(S1,ℝd). This result directly implies the convergence of almost minimizers of the discrete energies...
Discriminant d’un germe et quotients de contact dans la résolution de
Distances of Heegaard splittings.
Distortion in transformation groups (with an appendix by Yves de Cornulier).
Distribution of Points of Odd Degree of Certain Triangulations in the Plane.
Divergence in Submanifolds.
Divisibility of twisted Alexander polynomials and fibered knots
We prove that Wada’s twisted Alexander polynomial of a knot group associated to any nonabelian -representation is a polynomial. As a corollary, we show that it is always a monic polynomial of degree for a fibered knot of genus .
DNA knotting in spooling like conformations in bacteriophages.
Does the Jones polynomial detect unknottedness?
Dotted links, Heegaard diagrams, and colored graphs for PL 4-manifolds.
The present paper is devoted to establish a connection between the 4-manifold representation method by dotted framed links (or -in the closed case- by Heegaard diagrams) and the so called crystallization theory, which visualizes general PL-manifolds by means of edge-colored graphs.In particular, it is possible to obtain a crystallization of a closed 4-manifold M4 starting from a Heegaard diagram (#m(S1 x S2),ω) and the algorithmicity of the whole process depends on the effective possibility of recognizing...
Double coverings and reflexive abelian hypermaps.
Double suspension d'une sphère d'homologie
Doubles of groups and hyperbolic LERF 3-manifolds.
Dualité dans les revetements galoisiens.
Dynamical systems and the homology norm of a 3-manifold II.
Dynamics of out on the boundary of outer space
Dynamics on Character Varieties and Malgrange irreducibility of Painlevé VI equation
We consider representations of the fundamental group of the four punctured sphere into . The moduli space of representations modulo conjugacy is the character variety. The Mapping Class Group of the punctured sphere acts on this space by symplectic polynomial automorphisms. This dynamical system can be interpreted as the monodromy of the Painlevé VI equation. Infinite bounded orbits are characterized: they come from -representations. We prove the absence of invariant affine structure (and invariant...