Results 1 to 10 of about 5,840 (179)

Regular homotopy and total curvature [PDF]

open access: yes, 2006
We consider properties of the total absolute geodesic curvature functional on circle immersions into a Riemann surface. In particular, we study its behavior under regular homotopies, its infima in regular homotopy classes, and the homotopy types of ...
Ekholm, Tobias
core   +1 more source

Configuration spaces and Vassiliev classes in any dimension [PDF]

open access: yes, 2002
The real cohomology of the space of imbeddings of S^1 into R^n, n>3, is studied by using configuration space integrals. Nontrivial classes are explicitly constructed. As a by-product, we prove the nontriviality of certain cycles of imbeddings obtained by
Alberto S Cattaneo   +16 more
core   +4 more sources

The rigidity of embedded constant mean curvature surfaces [PDF]

open access: yes, 2007
We study the rigidity of complete, embedded constant mean curvature surfaces in R^3. Among other things, we prove that when such a surface has finite genus, then intrinsic isometries of the surface extend to isometries of R^3 or its isometry group ...
Meeks III, William H.   +1 more
core   +2 more sources

Homology of spaces of regular loops in the sphere [PDF]

open access: yes, 2009
In this paper we compute the singular homology of the space of immersions of the circle into the $n$-sphere. Equipped with Chas-Sullivan's loop product these homology groups are graded commutative algebras, we also compute these algebras. We enrich Morse
Borgne, Jean-Francois Le, Chataur, David
core   +1 more source

Existence and Regularity of Spheres Minimising the Canham-Helfrich Energy

open access: yes, 2020
We prove existence and regularity of minimisers for the Canham-Helfrich energy in the class of weak (possibly branched and bubbled) immersions of the $2$-sphere.
Mondino, Andrea, Scharrer, Christian
core   +1 more source

Surface cubications mod flips

open access: yes, 2007
Let $\Sigma$ be a compact surface. We prove that the set of surface cubications modulo flips, up to isotopy, is in one-to-one correspondence with $\Z/2\Z\oplus H_1(\Sigma,\Z/2\Z)$.Comment: revised version ...
Funar, Louis
core   +4 more sources

Double point self-intersection surfaces of immersions

open access: yes, 2000
A self-transverse immersion of a smooth manifold M^{k+2} in R^{2k+2} has a double point self-intersection set which is the image of an immersion of a smooth surface, the double point self-intersection surface.
Asadi-Golmankhaneh, Mohammad A.   +1 more
core   +3 more sources

Cartan--Whitney Presentation, Non-smooth Analysis and Smoothability of Manifolds: On a theorem of Kondo--Tanaka [PDF]

open access: yes, 1968
Using tools and results from geometric measure theory, we give a simple new proof of the main result (Theorem 1.3) in K. Kondo and M. Tanaka, Approximation of Lipschitz Maps via Immersions and Differentiable Exotic Sphere Theorems, \textit{Nonlinear Anal.
Li, Siran
core   +4 more sources

Partial Isometries of a Sub-Riemannian Manifold

open access: yes, 2012
In this paper, we obtain the following generalisation of isometric $C^1$-immersion theorem of Nash and Kuiper. Let $M$ be a smooth manifold of dimension $m$ and $H$ a rank $k$ subbundle of the tangent bundle $TM$ with a Riemannian metric $g_H$.
Eliashberg Y.   +3 more
core   +1 more source

On a Liu--Yau type inequality for surfaces

open access: yes, 2014
Let $\Omega$ be a compact and mean-convex domain with smooth boundary $\Sigma:=\partial\Omega$, in an initial data set $(M^3,g,K)$, which has no apparent horizon in its interior.
Hijazi, Oussama   +2 more
core   +3 more sources

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