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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.

168,657 papers · 148 categories

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89178266355 · Jun 202019922001200920172026
48 results for spherical representation

Spherical representations and functions are the building blocks for harmonic analysis on riemannian symmetric spaces. In this paper we consider spherical functions and spherical representations related to certain infinite dimensional symmetric spaces G/K=limGn/KnG_\infty/K_\infty = \varinjlim G_n/K_n. We use the representation t…

2011-10-04abs ↗pdf ↗

In this work, we studied the properties of the spherical indicatrices of a Bertrand curve and its mate curve and presented some characteristic properties in the cases that Bertrand curve and its mate curve are slant helices, spherical indicatrices are slant helices and we also researched that whether the spherical indi…

2011-10-19abs ↗pdf ↗

In this paper, new representations of a Bertrand curve pair in three dimensional Lie groups with bi-invariant metric are given. Besides, the spherical indicatrices of a Bertrand curve pair are obtain and the relations between the spherical indicatrices and new representations of Bertrand curve pair are shown.

2018-01-10abs ↗pdf ↗

In this paper we develop a method to compute the Burns-Epstein invariant of a spherical CR homology sphere, up to an integer, from its holonomy representation. As application, we give a formula for the Burns-Epstein invariant, modulo an integer, of a spherical CR structure on a Seifert fibered homology sphere in terms …

2008-11-29abs ↗pdf ↗

We classify hyperbolic monopoles with continuous symmetries and construct new examples.

problem Classifying and constructing hyperbolic monopoles with continuous symmetries.
method Developed a Structure Theorem and used representation theory to simplify the problem.
result Found constraints on structure groups and constructed novel spherically symmetric Sp(n)\mathrm{Sp}(n) hyperbolic monopoles.

A spherical topological manifold of dimension n-1 forms a prototile on its cover, the (n-1)-sphere. The tiling is generated by the fixpoint-free action of the group of deck transformations. By a general theorem, this group is isomorphic to the first homotopy group. Multiplicity and selection rules appear in the form of…

2008-10-19abs ↗pdf ↗

Study ΘΘ-invariants for spherical 3-manifolds via Zπ\mathbb{Z}π-homology equivalences.

problem Computing ΘΘ-invariants for spherical 3-manifolds via Zπ\mathbb{Z}π-homology equivalences.
method Using Bott and Cattaneo's ΘΘ-invariants, defined by integrals over configuration spaces with local systems, and representation theory of finite groups.
result Computed upper bounds for dimensions of spaces spanned by ΘΘ-invariants and finite type invariants.

Developed a diffusion model on spherical data, addressing geometric and stochastic challenges.

problem Diffusion models on spherical data face unique geometric and stochastic issues.
method Extended spectral diffusion to spherical harmonics, introducing modified stochastic differential equations.
result Introduced a geometry-dependent inductive bias in spectral diffusion models.

We consider the discrete representations of 3-manifold groups into PU(2,1)PU(2,1) that appear in the Falbel-Koseleff-Rouillier census, such that the peripheral subgroups have cyclic unipotent holonomy. We show that two of these representations have conjugate images, even though they represent different 3-manifold groups. Th…

2014-10-02abs ↗pdf ↗

Study spherical Fourier transform on hypergeometric type harmonic manifolds.

problem Spherical Fourier transform on harmonic Hadamard manifolds.
method Representation of spherical functions by Gauss hypergeometric functions.
result Inversion formula, convolution rule, and Plancherel theorem are derived.

Derives a formula for fermion dimensions in spherically symmetric monopole backgrounds.

problem Calculating the dimension of the plane-wave normalizable kernel for massless fermions in spherically symmetric monopole backgrounds.
method Derives a formula for the dimension of the plane-wave normalizable kernel of the Dirac operator for fermions of any representation of SU(N) in the presence of any spherically symmetric monopole background.
result Derives a formula for the dimension of the plane-wave normalizable kernel of the Dirac operator.

Consider a three dimensional cusped spherical CR\mathrm{CR} manifold MM and suppose that the holonomy representation of π1(M)π_1(M) can be deformed in such a way that the peripheral holonomy is generated by a non-parabolic element. We prove that, in this case, there is a spherical CR\mathrm{CR} structure on some Dehn sur…

2015-09-15abs ↗pdf ↗

Characterizes representations for complex projective structures with specific branch data.

problem Understanding representations of surface groups as holonomy of complex projective structures.
method Computing holonomies for spherical metrics and affine structures with prescribed conical angles.
result Computed holonomies for spherical metrics and affine structures with specific conical angles.

Enhances Gaussian processes with spherical features for better scalability and flexibility.

problem Lack of representation learning in Gaussian processes compared to deep neural networks.
method Introduces spherical inter-domain features to improve GP approximation and scalability.
result The method alleviates limitations and improves scalability compared to alternative strategies.

The paper explores geometric properties of interception curves on planes and spheres.

problem Geometric properties of interception curves defined by differential equations.
method Parametric representation and spherical curve defined by Gudermannian function.
result Symmetry/asymmetry between spherical and planar cases, connections to lemniscate constants.

Third-order PDEs describe spherical and pseudospherical surfaces.

problem Equations for spherical and pseudospherical surfaces.
method Classification of third-order PDEs using compatibility conditions and linear problems.
result Explicit classification of equations describing spherical and pseudospherical surfaces.

We give a complete classification of intertwining operators (symmetry breaking operators) between spherical principal series representations of G=O(n+1,1) and G'=O(n,1). We construct three meromorphic families of the symmetry breaking operators, and find their distribution kernels and their residues at all poles explic…

2013-10-11abs ↗pdf ↗

Paper introduces S3W distance for spherical probability distributions.

problem Comparing spherical probability distributions efficiently and accurately.
method S3W distance using stereographic projection and generalized Radon transform.
result Extensive theoretical analysis and evaluation of S3W performance.

Bayesian approach approximates probability functions of Gaussian mixtures.

problem Approximating probability functions of non-spherical Gaussian mixtures.
method Bayesian decomposition, spherical radial decomposition, random sampling.
result Established differentiability and integral representation of gradient for probability functions.

DeepSphere improves spherical CNNs by balancing efficiency and rotation equivariance.

problem Designing efficient and rotation-equivariant convolutional layers for spherical data.
method Graph-based approach to represent spherical data, focusing on the number of vertices and neighbors.
result DeepSphere achieves state-of-the-art performance and demonstrates efficiency and flexibility.

SRCA reduces high-dimensional data to lower dimensions while preserving geometric structures.

problem High-dimensional datasets with underlying geometric structures.
method Spherical Rotation Component Analysis (SRCA) incorporating geometric loss functions.
result SRCA provides a low-rank spherical representation of data with general theoretic guarantees.

This paper connects Laguerre minimal surfaces to Weierstrass representations.

problem Understanding the relationship between Laguerre minimal surfaces and Weierstrass representations.
method Defining spherical mean curvature and providing Weierstrass-type representations for two classes of surfaces.
result Laguerre minimal surfaces are related to H2H_2-surfaces, providing a new Weierstrass-type representation.

Derives TAP approximation for Bayesian linear regression.

problem Log-normalizing constant of posterior distribution in high-dimensional linear regression.
method Variational representation and Thouless-Anderson-Palmer approximation.
result Proves TAP approximation for spherical prior in proportional asymptotic regime.

Researchers determine all possible representations of monodromy for Schwarzian equations on punctured surfaces.

problem Determine representations of monodromy for Schwarzian equations on punctured surfaces.
method Explicit constructions of complex affine structures on punctured surfaces, with prescribed holonomy.
result All possible representations of monodromy for Schwarzian equations on punctured surfaces are determined.

We study surfaces of constant positive Gauss curvature in Euclidean 3-space via the harmonicity of the Gauss map. Using the loop group representation, we solve the regular and the singular geometric Cauchy problems for these surfaces, and use these solutions to compute several new examples. We give the criteria on the …

2015-06-04abs ↗pdf ↗

The geometry of symmetric spaces, polar actions, isoparametric submanifolds and spherical buildings is governed by spherical Weyl groups and simple Lie groups. A natural generalization of semisimple Lie groups are affine Kac-Moody groups as they mirror their structure theory and have good explicitely known representati…

2010-03-23abs ↗pdf ↗

Study integral kernels on complex symmetric spaces and their Dyson Brownian Motion applications.

problem Analysis of integral kernels on complex symmetric spaces.
method Simple new method of alternating sum formulas to construct WW-invariant kernels and their asymptotic behavior.
result Obtained asymptotic behavior of integral kernels and applied to Dyson Brownian Motion.

Minimal Morse functions on Poincaré dodecahedral space are selected via spectral properties.

problem Identifying minimal Morse functions on the Poincaré dodecahedral space.
method Spectral selection property P, obstruction principle, conformal variations, finite dimensional reduction.
result Restoration of minimal Morse selection on the Poincaré dodecahedral space via spectral mechanisms.

A string-net model associates a vector space to a surface in terms of graphs decorated by objects and morphisms of a pivotal fusion category modulo local relations. String-net models are usually considered for spherical fusion categories, and in this case the vector spaces agree with the state spaces of the correspondi…

2019-07-29abs ↗pdf ↗

This paper considers statistical estimation problems where the probability distribution of the observed random variable is invariant with respect to actions of a finite topological group. It is shown that any such distribution must satisfy a restricted finite mixture representation. When specialized to the case of dist…

2014-11-10abs ↗pdf ↗

Paper proposes SMFN for high-res spherical video super-resolution.

problem Super-resolution of 360-degree panoramic videos is expensive and challenging.
method Deformable convolutions, mixed attention mechanism, dual learning strategy, weighted mean square error loss function.
result The proposed SMFN method improves super-resolution of equatorial regions in 360-degree videos.