L'ordre de Dehornoy sur les tresses
Lorentzian similarity manifolds
An (m+2)-dimensional Lorentzian similarity manifold M is an affine flat manifold locally modeled on (G,ℝm+2), where G = ℝm+2 ⋊ (O(m+1, 1)×ℝ+). M is also a conformally flat Lorentzian manifold because G is isomorphic to the stabilizer of the Lorentzian group PO(m+2, 2) of the Lorentz model S m+1,1. We discuss the properties of compact Lorentzian similarity manifolds using developing maps and holonomy representations.
Losik cohomology of the Lie algebra of infinitesimal automorphisms of a -structure
Losik cohomology of the Lie algebra of infinitesimal automorphisms of a -structure. II
Lower-Bound Theorems for Pseudomanifolds.
L-theory and dihedral homology.
Lusternik-Schnirelmann category: a geometric approach
Malnormal subgroups and Frobenius groups: basics and examples
Malnormal subgroups occur in various contexts. We review a large number of examples, and compare the general situation to that of finite Frobenius groups of permutations.In a companion paper [18], we analyse when peripheral subgroups of knot groups and -manifold groups are malnormal.
Manifold Approximate Fibrations are Approximately Bundles.
Manifold structures on abstract regular polytopes.
Manifolds as branched covers of spheres.
Manifolds of almost nonnegative curvature
Manifolds of even dimension with amenable fundamental group.
Manifolds of mappings between open manifolds
Manifolds of the homotopy type of a bouquet of spheres
Manifolds which admit actions
Manifolds with a given homology and fundamental gorup.
Manifolds with a special type of conelike singularities.
Manifolds with a unique embedding
We show that if X, Y are smooth, compact k-dimensional submanifolds of ℝⁿ and 2k+2 ≤ n, then each diffeomorphism ϕ: X → Y can be extended to a diffeomorphism Φ: ℝⁿ → ℝⁿ which is tame (to be defined in this paper). Moreover, if X, Y are real analytic manifolds and the mapping ϕ is analytic, then we can choose Φ to be also analytic. We extend this result to some interesting categories of closed (not necessarily compact) subsets of ℝⁿ, namely, to the category of Nash submanifolds...
Manifolds with non-stable fundamental groups at infinity.