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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

168,695 papers · 148 categories

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111223334445 · Jun 202019922001200920172026
48 results for closed embedded manifolds

For each composite number n2kn\ne 2^k, there does not exist a single connected closed (n+1)(n+1)-manifold such that any smooth, simply-connected, closed nn-manifold can be topologically flat embedded into it. There is a single connected closed 5-manifold WW such that any simply-connected, 4-manifold MM can be topologica…

2005-09-24abs ↗pdf ↗

Solves embedding problem for 5D manifolds into Calabi-Yau 3-folds.

problem Embedding a 5D manifold into a Calabi-Yau 3-fold with a specific 3-form.
method Defines 'strongly pseudoconvex' 3-forms and shows solvability of embedding problem for these forms under certain conditions.
result Perturbative embedding problem can be solved for closed strongly pseudoconvex 3-forms if a vector space of obstructions vanishes.

Study on embedding surfaces into 3-manifolds, focusing on equivariant cases.

problem Embedding hyperbolic surfaces into hyperbolic 3-manifolds with specific symmetries.
method Examined orientation-preserving and orientation-reversing actions on surfaces, including nonorientable ones.
result Found conditions for equivariant embeddings of hyperbolic surfaces into hyperbolic 3-manifolds.

The purpose of this article is to study co-dimension 22 iso-contact embeddings of closed contact manifolds. We first show that a closed contact manifold (M2n1,ξM)(M^{2n-1}, ξ_M) iso-contact embeds in a contact manifold (N2n+1,ξN),(N^{2n+1}, ξ_N), provided MM contact embeds in (N,ξN)(N, ξ_N) with a trivial normal bundle and the contact s…

2018-08-13abs ↗pdf ↗

In this note, we discuss embeddings of 33--manifolds via open books. First we show that every open book of every closed orientable 33--manifold admits an open book embedding in any open book decompistion of S2×S3S^2 \times S^3 and S2×~S3S^2 \widetilde{\times} S^3 with the page a disk bundle over S2S^2 and monodromy the iden…

2018-06-26abs ↗pdf ↗

We show that, for a closed orientable n-manifold, with n not congruent to 3 modulo 4, the existence of a CR-regular embedding into complex (n-1)-space ensures the existence of a totally real embedding into complex n-space. This implies that a closed orientable (4k+1)-manifold with non-vanishing Kervaire semi-characteri…

2018-03-22abs ↗pdf ↗

The paper introduces the spirality character of the almost fiber part for a closed essentially immersed subsurface of a closed orientable aspherical 3-manifold, which generalizes an invariant due to Rubinstein and Wang. The subsurface is virtually embedded if and only if the almost fiber part is aspiral, and in this ca…

2014-06-18abs ↗pdf ↗

We show that if C is a simple closed curve bounding an embedded disk in a closed 3-manifold M, then there exists a disk D in M with boundary C such that D minimizes the area among the embedded disks with boundary C. Moreover, D is smooth, minimal and embedded everywhere except where the boundary C meets the interior of…

2010-05-11abs ↗pdf ↗

Geodesic surfaces embed into hyperbolic 3-manifolds for all finite group actions.

problem Embedding geodesic surfaces into hyperbolic 3-manifolds.
method Analyzing finite group actions on surfaces and proving geodesic embeddings for all irreducible cases.
result All quasiplatonic surfaces embed geodesically into hyperbolic 3-manifolds.

The purpose of this paper is to present, for all n3n\ge 3, very simple examples of continuous maps f:Mn1Mnf:M^{n-1} \to M^{n} from closed (n1)(n-1)-manifolds Mn1M^{n-1} into closed nn-manifold MnM^n such that even though the singular set S(f)S(f) of ff is countable and dense, the map ff can nevertheless be approximated by an …

2008-03-29abs ↗pdf ↗

Sharp fractional Sobolev inequalities on closed manifolds identified.

problem Critical fractional Sobolev embedding on closed Riemannian manifolds.
method Intrinsic heat-kernel based framework, determining optimal coefficients, proving sharp inequalities.
result Sharp pp-power inequality and almost sharp inequality established.

This paper studies certain embedded spheres in closed affine manifolds. For n3n \geq 3, we investigate the dome bodies in a closed affine nn-manifold MM with its boundary homeomorphic to a sphere under the assumption that a developing map restricted to a component of M^\partial\hat{M} is an embedding onto a strictly …

2011-10-16abs ↗pdf ↗

We find conditions under which a non-orientable closed surface S embedded into an orientable closed 4-manifold X can be represented by a connected sum of an embedded closed surface in X and an unknotted projective plane in a 4-sphere. This allows us to extend the Gabai 4-dimensional light bulb theorem and the Auckly-Ki…

2018-08-26abs ↗pdf ↗

Topological manifolds can be embedded flatly in high-dimensional Euclidean space and are locally retracts.

problem Embedding and retraction of topological manifolds in Euclidean spaces.
method Locally flat embedding and retraction of manifolds in high-dimensional Euclidean space.
result Every topological n-manifold can be embedded locally flatly in R2n+1R^{2n+1} and is a retract of some neighborhood in R2n+1R^{2n+1}.

Estimates the first eigenvalue for embedded hypersurfaces in manifolds with Ricci curvature bounds.

problem Estimating the first eigenvalue for embedded hypersurfaces in manifolds with Ricci curvature bounds.
method Establishes a lower bound for the first nonzero eigenvalue of the Laplacian on embedded hypersurfaces in a closed oriented Riemannian manifold under Ricci curvature and sectional curvature bounds.
result The estimate depends on ambient curvature bounds, normal injectivity radius, and geometry of the hypersurface.

Study symplectic embeddings of 4-manifolds using Lefschetz fibrations.

problem Proper symplectic and iso-symplectic embeddings of 4-manifolds in 6-manifolds.
method Use Lefschetz fibrations to study symplectic embeddings.
result Closed orientable smooth 4-manifolds admitting Lefschetz fibrations over CP^1 can be embedded symplectically in (CP^1 × CP^1 × CP^1, ω_pr).

New symplectic caps and embeddings found in complex projective plane.

problem Embeddings of homology balls in complex projective plane.
method Handlebody construction of symplectic caps and embeddings.
result First examples of symplectic handlebody decompositions of a closed symplectic 4-manifold.

Paper proves embedding theorem for conformally compact manifolds.

problem Embedding conformally compact manifolds into hyperbolic spaces.
method Proves analogous Nash Embedding Theorem for conformally compact manifolds.
result Conformally compact manifolds can be isometrically embedded into hyperbolic spaces.

Every closed, oriented, real analytic Riemannian 3-manifold can be isometrically embedded as a special Lagrangian submanifold of a Calabi-Yau 3-fold, even as the real locus of an antiholomorphic, isometric involution. Every closed, oriented, real analytic Riemannian 4-manifold whose bundle of self-dual 2-forms is trivi…

1999-12-31abs ↗pdf ↗

We obtain estimations for isotopy classes of embeddings of closed k-connected n-manifolds into R^{2n-k-1} for n>2k+5 and k\ge0. This is done in terms of an exact sequence involving the Whitney invariants and an explicitly constructed action of H_{k+1}(N;Z_2) on the set of embeddings. (For k\ne1 classification results w…

2008-12-01abs ↗pdf ↗

New examples of mean curvature flow converge to minimal surfaces with multiplicity 2.

problem Constructing mean curvature flow examples in closed manifolds.
method Constructing new examples of mean curvature flow with convergence to minimal surfaces with multiplicity 2.
result Mean curvature flow examples converge to minimal surfaces with multiplicity 2.

Let NN be a closed orientable connected nn-manifold, n4n\ge 4. We classify embeddings of the punctured manifold N0N_0 into R2n1\R^{2n-1} up to isotopy. Our result in some sense extends results of J.C. Becker -- H.H. Glover (1971) and O. Saeki (1999).

2010-10-20abs ↗pdf ↗

We prove that for any compact orientable connected 3-manifold with torus boundary, a concatenation of it and the direct product of the circle and the Klein bottle with an open 2-disk removed admits a Lagrangian embedding into the standard symplectic 6-space. Moreover, minimal Maslov number of the Lagrangian embedding i…

2019-02-14abs ↗pdf ↗

Let XX be a union of a sequence of symplectic manifolds of increasing dimension and let MM be a manifold with a closed 22-form ωω. We use Tischler's elementary method for constructing symplectic embeddings in complex projective space to show that the map from the space of embeddings of MM in XX to the cohomology …

2014-04-09abs ↗pdf ↗

We study piecewise linear co-dimension two embeddings of closed oriented manifolds in Euclidean space, and show that any such embedding can always be isotoped to be a closed braid as long as the ambient dimension is at most five, extending results of Alexander (in ambient dimension three), and Viro and independently Ka…

2017-03-24abs ↗pdf ↗