Holonomie et cycle évanouissant
On démontre que l’holonomie est non triviale au voisinage d’un cycle évanouissant au moyen d’un critère d’Imanishi et on donne une démonstration non standard de ce dernier.
Holonomie et feuilles exceptionnelles
Dans le présent travail, nous obtenons plusieurs caractérisations de feuilles propres et de feuilles denses des feuilletages transversalement de codimension 1 de variétés indifféremment compactes et non compactes.Ces caractéristiques sont algébriques et concernent la structure des semi-groupes sécants d’homotopie et d’homologie que nous avons définis et utilisés ailleurs.Par l’intermédiaire de corollaires sur l’existence d’holonomie dans l’adhérence des feuilles exceptionnelles, nous en déduisons...
Holonomy groups of complete flat manifolds
We present short direct proofs of two known properties of complete flat manifolds. They say that the diffeomorphism classes of m-dimensional complete flat manifolds form a finite set and that each element of is represented by a manifold with finite holonomy group.
Holonomy groups of five dimensional Bieberbach groups.
Holonomy, twisting cochains and characteristic classes
This paper contains a description of various geometric constructions associated with fibre bundles, given in terms of important algebraic object, the “twisting cochain". Our examples include the Chern-Weil classes, the holonomy representation and the so-called cyclic Chern character of Bismut and others (see [2, 11, 27]), also called the Bismut’s class. The later example is the principal one for us, since we are motivated by the attempt to find an algebraic approach to the Witten’s index formula....
Homeomorphic conjugates of Fuchsian groups.
Homeomorphic non-diffeomorphic surfaces with samll invariants.
Homeomorphism Groups and the Topologist's Sine Curve
It is shown that deleting a point from the topologist's sine curve results in a locally compact connected space whose autohomeomorphism group is not a topological group when equipped with the compact-open topology.
Homeomorphism groups of manifolds and Erdős space.
Homeomorphism groups of Sierpiński carpets and Erdős space
Erdős space is the “rational” Hilbert space, that is, the set of vectors in ℓ² with all coordinates rational. Erdős proved that is one-dimensional and homeomorphic to its own square × , which makes it an important example in dimension theory. Dijkstra and van Mill found topological characterizations of . Let , n ∈ ℕ, be the n-dimensional Menger continuum in , also known as the n-dimensional Sierpiński carpet, and let D be a countable dense subset of . We consider the topological group of all...
Homeomorphisms of the sphere and a generalization of the Whyburn conjecture for compact connected manifolds with boundary
Homeotopy groups of compact 2-manifolds
Homeotopy groups of orientable 2-manifolds
Homeotopy groups of punctured spheres with holes
Homeotopy groups of surfaces whose boundary is the union of 1-spheres
Homfly polynomials as vassiliev link invariants
We prove that the number of linearly independent Vassiliev invariants for an r-component link of order n, which derived from the HOMFLY polynomial, is greater than or equal to min{n,[(n+r-1)/2]}.
Homfly polynomials of generalized Hopf links.
Homogeneity of dynamically defined wild knots.
In this paper we prove that a wild knot K which is the limit set of a Kleinian group acting conformally on the unit 3-sphere, with its standard metric, is homogeneous: given two points p, q ∈ K, there exists a homeomorphism f of the sphere such that f(K) = K and f(p) = q. We also show that if the wild knot is a fibered knot then we can choose an f which preserves the fibers.
Homogeneity rank of real representations of compact Lie groups.
Homogeneous C R-manifolds.