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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.

169,341 papers · 148 categories

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48 results for incomplete edge spaces

The paper proves local and long-term existence of Ricci de Turck flow on incomplete edge manifolds.

problem Proving existence of Ricci de Turck flow on incomplete edge manifolds.
method Careful analysis of the Lichnerowicz Laplacian and the Ricci de Turck flow equation.
result Local and long-term existence of Ricci de Turck flow on incomplete edge manifolds.

We derive a formula for the index of a Dirac operator on a compact, even-dimensional incomplete edge space satisfying a "geometric Witt condition". We accomplish this by cutting off to a smooth manifold with boundary, applying the Atiyah-Patodi-Singer index theorem, and taking a limit. We deduce corollaries related to …

2013-12-16abs ↗pdf ↗

The article proves long-time existence and convergence of the edge Yamabe flow.

problem Analyzing the normalized Yamabe flow on incomplete edge singularities.
method Novel maximum principle results and uniform bounds established without barrier functions or Krylov-Safonov estimates.
result Long-time existence and convergence of the edge Yamabe flow.

Incomplete cusp edges model the behavior of the Weil-Petersson metric on the compactified Riemann moduli space near the interior of a divisor. Assuming such a space is Witt, we construct a fundamental solution to the heat equation, and using a precise description of its asymptotic behavior at the singular set, we prove…

2015-09-21abs ↗pdf ↗

We consider the heat operator acting on differential forms on spaces with complete and incomplete edge metrics. In the latter case we study the heat operator of the Hodge Laplacian with algebraic boundary conditions at the edge singularity. We establish the mapping properties of the heat operator, recovering and extend…

2011-05-25abs ↗pdf ↗

Let (M,g) be a compact oriented Riemannian manifold with an incomplete edge singularity. This article shows that it is possible to evolve g by the Yamabe flow within a class of singular edge metrics. As the main analytic step we establish parabolic Schauder-type estimates for the heat operator on certain Hölder spaces …

2011-07-26abs ↗pdf ↗

Let (X,g)(X,g) be a compact Riemannian stratified space with simple edge singularity. Thus a neighbourhood of the singular stratum is a bundle of truncated cones over a lower dimensional compact smooth manifold. We calculate the various polynomially weighted de Rham cohomology spaces of XX, as well as the associated spac…

2005-03-16abs ↗pdf ↗

Study shows long-term flow on special manifolds with positive Yamabe constant.

problem Analyzing long-time behavior of Yamabe flow on singular spaces.
method Formulated axioms for long-time existence, used parabolic Moser iteration for bounds.
result Established long-time existence of normalized Yamabe flow on specified manifolds.

Improved prediction accuracy in matrix factorization using graph-based priors.

problem Graph side-information may not align with latent-feature relations in matrix completion.
method Identify and remove 'contested' edges using graphical lasso approximation, maintaining linear scalability.
result Improved prediction accuracy with fewer graph edges, demonstrating the often inaccurate nature of graph side-information.

Bayesian method infers transition matrices from incomplete graph data with topological constraints.

problem Inference of transition matrices from incomplete graph data with topological constraints.
method Bayesian approach using repeated interactions and a topological prior.
result Higher accuracy in inferring transition probabilities, improving downstream tasks.

Incomplete pressure metric on bordered surface Teichmüller space proved.

problem Incompleteness of pressure metric on Teichmüller space of bordered surfaces.
method Using moduli space of metric graphs and fat graphs associated to bordered surfaces.
result Pressure metric is not a constant multiple of Weil-Petersson metric.

Proves limit curve theorem for incomplete metric spaces, applies to null distance in Lorentzian manifolds.

problem Control of Lorentzian lengths of limit curves in incomplete metric spaces.
method Proves limit curve theorem for incomplete metric spaces and applies to null distance.
result Strong control on Lorentzian lengths of limit curves in Sormani and Vegas' null distance.

Paper explores exact recovery of communities in weighted graphs using Gaussian and exponential distributions.

problem Exact recovery of communities in weighted graphs with Gaussian and exponential distributions.
method Introduces a new semi-metric to describe conditions for exact recovery and analyzes conditions for both complete and incomplete graphs.
result Necessary and sufficient conditions for exact recovery are asymptotically tight and applicable to both complete and incomplete graphs.

Formula derived for G2G_2-manifolds, showing moduli spaces are incomplete.

problem Incompleteness of moduli spaces for G2G_2-manifolds.
method Derived a formula for the energy of paths in moduli spaces, provided conditions for finite energy and length.
result Compact G2G_2-manifolds produced by the generalised Kummer construction have incomplete moduli spaces.

The paper proves pseudolocality theorems for Ricci flows on incomplete manifolds.

problem Pseudolocality of Ricci flows on incomplete manifolds.
method Proves pseudolocality theorems for Ricci flows under specific curvature and isoperimetric conditions.
result Constructs solutions of Ricci flow in balls with pseudolocality property.

Tian initiated the study of incomplete Kähler-Einstein metrics on quasi-projective varieties with cone-edge type singularities along a divisor, described by the cone-angle 2π(1α)2π(1-α) for α(0,1)α\in (0, 1). In this paper we study how the existence of such Kähler-Einstein metrics depends on αα. We show that in the negative s…

2012-09-30abs ↗pdf ↗

The paper studies cohomology on incomplete manifolds and stratified spaces.

problem Analyzing cohomology groups on incomplete Riemannian manifolds and stratified spaces.
method Proves injective/surjective maps between LpL^p and L2L^2 cohomology groups under certain conditions.
result Injective/surjective maps between LpL^p and L2L^2 cohomology groups are established.

A new method for state estimation in state-space models using incomplete data.

problem State estimation in nonlinear state-space models with incomplete observations.
method Statistical analysis of incomplete observations, score function, observed information matrices, EM-gradient-particle filtering.
result Maximum likelihood estimation of state-vector with explicit form of observed information matrix.

Gradient descent near stability threshold exhibits sharpness oscillations.

problem Understanding sharpness behavior near stability threshold in non-Euclidean norms.
method Interpreted EoS through Directional Smoothness and generalized sharpness under arbitrary norms.
result Non-Euclidean GD with generalized sharpness shows sharpness oscillations near 2/η2/η.

New risk measures for incomplete markets without lattice structures.

problem Risk measures on incomplete markets without lattice structures.
method Study of risk measures without lattice structures, focusing on tractable dual representations and solid superspaces.
result Existence of a tractable dual representation equivalent to a Fatou-like property, and extension theorems under certain conditions.

Study dualities of geometric invariants on cuspidal edges in hyperbolic and de Sitter spaces.

problem Computing and understanding dualities of geometric invariants on cuspidal edges.
method Analyzing differential geometric invariants of cuspidal edges in hyperbolic and de Sitter spaces.
result Identified dualities of invariants on cuspidal edges.

Study special Lagrangian submanifolds with edge singularities using elliptic theory.

problem Characterize the moduli space of deformations of special Lagrangian submanifolds with edge singularities.
method Use elliptic theory for edge-degenerate differential operators on singular manifolds.
result Obtain a general theorem describing the local structure of the moduli space.

Along cuspidal edge singularities on a given surface in Euclidean 3-space, which can be parametrized by a regular space curve, a unit normal vector field νν is well-defined as a smooth vector field of the surface. A cuspidal edge singular point is called generic if the osculating plane of the cuspidal edge (as a regul…

2014-08-19abs ↗pdf ↗

In L^3, cuspidal edges can have bounded mean curvature under specific conditions.

problem Understanding cuspidal edges with bounded mean curvature in Lorentz-Minkowski 3-space.
method Investigated cuspidal edges and generalized cuspidal edges, analyzing their singular points and principal curvatures.
result Cuspidal edges with bounded mean curvature in L^3 occur only when the singular set is a light-like curve.

Kernel clustering algorithm improved for large datasets using incomplete Cholesky factorization.

problem Large memory usage in kernel-based clustering for large-scale datasets.
method Approximate the kernel matrix using incomplete Cholesky factorization and apply linear kk-means clustering.
result The proposed method achieves similar performance to kernel kk-means clustering but handles large-scale datasets efficiently.

Researchers develop multi-utility representations for incomplete preferences linked to risk measures.

problem Handling incomplete preferences induced by set-valued risk measures.
method Established dual representations of set-valued risk measures to create parsimonious and well-behaved multi-utility representations.
result Unified dual representations of set-valued risk measures, linking them to scalar risk measures.

New method clusters strong and weak views effectively, improving performance by up to 40%.

problem Clustering incomplete multi-view data with unbalanced incompleteness.
method View evolution scheme and weighted multi-view subspace clustering.
result Improves clustering performance by up to 40% on three metrics.