Research
On-device research index

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.

169,181 papers · 148 categories

Trend · papers per month

89178266355 · Jun 202019922001200920182026
48 results for Local Fields

We prove a monodromy theorem for local vector fields belonging to a sheaf satisfying the unique continuation property. In particular, in the case of admissible regular sheaves of local fields defined on a simply connected manifold, we obtain a global extension result for every local field of the sheaf. This generalizes…

2015-07-13abs ↗pdf ↗

We present an algebraic procedure that finds the Lie algebra of the local Killing fields of a smooth metric. In particular, we determine the number of independent local Killing fields about a given point on the manifold. Spaces of constant curvature and locally symmetric spaces are also discussed. Furthermore, we obtai…

2008-08-27abs ↗pdf ↗

New method constructs axial vector fields and defines quasi-local spin-angular momentum.

problem Constructing axial vector fields on Riemannian two-spheres.
method Using centre-of-mass unit sphere reference systems and Lie-propagated unit sphere reference systems.
result Constructive definition of quasi-local spin-angular momentum and balance relations.

New approach to Lagrangian field theories using pro-finite structures and L-infinity algebras.

problem Formulating Lagrangian field theories with locality constraints.
method Using pro-finite structures and L-infinity algebras to define local observables and a pre-multisymplectic form.
result Definition of L-infinity algebra of local observables based on Lagrangian cohomology.

Characterizes and describes selfsimilar Hessian manifolds with homothetic vector fields.

problem Understanding the structure and properties of selfsimilar Hessian manifolds.
method Characterization and description of selfsimilar manifolds with homothetic vector fields.
result Any selfsimilar Hessian manifold with a potential homothetic vector field is locally isomorphic to a product of radiant Hessian manifolds.

Compact lcK manifolds with holomorphic Lee field are Vaisman under certain conditions.

problem Characterizing compact locally conformally Kähler manifolds with holomorphic Lee fields.
method Analyzing conditions for a compact lcK manifold to be Vaisman when it has a holomorphic Lee vector field.
result Compact lcK manifolds with holomorphic Lee field are Vaisman if the Lee field has constant norm or the metric is Gauduchon.

Researchers found 5 local fields to uniquely describe 3D director fields, related through 6 differential relations.

problem Understanding the compatibility conditions for 3D director fields.
method Employed the method of moving frames.
result A director field is fully determined by five local fields related through six differential relations.

Local invertibility of higher rank tensor fields on curved manifolds proven.

problem Local invertibility of geodesic ray transform on tensor fields of rank four.
method Proved local invertibility up to potential fields on Riemannian manifolds with strictly convex boundary.
result Local invertibility of tensor fields of rank four on curved manifolds proven.

An explicit model of fiber bundle with local fibers being disinct copies of vector 3-space is introduced. They are endowed with frames which are used as local isotopic ones. The field local of isotopic frames is considered as gauge field itself while the form of gauge connections is derived from it. A covariant equatio…

1997-03-18abs ↗pdf ↗

In this paper, we first give two fundamental principles under a technique to characterize conformal vector fields of (α,β)(α,β) spaces to be homothetic and determine the local structure of those homothetic fields. Then we use the principles to study conformal vector fields of some classes of (α,β)(α,β) spaces under certain c…

2016-08-27abs ↗pdf ↗

Generalizing local Gromov-Witten theory, in this paper we define a local version of symplectic field theory. When the symplectic manifold with cylindrical ends is four-dimensional and the underlying simple curve is regular by automatic transversality, we establish a transversality result for all its multiple covers and…

2011-04-18abs ↗pdf ↗

Using the navigation data (h,W) of a Kropina space, we characterize weakly-Berwald Kropina spaces and Berwald Kropina spaces by means of the Killing vector field W and the parallel vector field W, respectively. Moreover, the local 1-parameter group of Finslerian local isometries of the Kropina space coincides with the …

2013-05-13abs ↗pdf ↗

We consider several transformation groups of a locally conformally Kähler manifold and discuss their inter-relations. Among other results, we prove that all conformal vector fields on a compact Vaisman manifold which is neither locally conformally hyperkähler nor a diagonal Hopf manifold are Killing, holomorphic and th…

2008-12-16abs ↗pdf ↗

Improved lattice field theory simulations with local-Autoregressive Conditional Normalizing Flow.

problem Efficiently sampling lattice field theories with computational challenges.
method Integrates locality into autoregressive conditional normalizing flows.
result Autocorrelation times improved by orders of magnitude for φ4φ^{4} theory on a 2D lattice.

Study vector fields with complex singularities, proving bounds and formulas.

problem Understanding the Milnor number of vector fields with specific singularities.
method Global and local formulas expressing Milnor/Poincare-Hopf contributions, sharp lower bounds under perturbations.
result Sharp lower bounds for Milnor number contributions under holomorphic perturbations.

Relating the Dirac operators on the total space and on the base manifold of a horizontally conformal submersion, we characterize Dirac morphisms, i.e. maps which pull back (local) harmonic spinor fields onto (local) harmonic spinor fields.

2008-05-05abs ↗pdf ↗

Paper presents a new Wi-Fi RSS and geomagnetic field database for indoor localization and trajectory estimation.

problem Indoor localization and trajectory estimation challenges.
method Convolutional neural network (CNN) for RSS data and LSTM network for geomagnetic field intensity.
result CNN and LSTM networks show feasibility for localization and trajectory estimation.

The aim of the paper is to understand the local forms of conformal vector fields in the neighborhood of a singularity. We begin a general study in this direction, for any pseudo-Riemannian type, and give a complete answer in the Riemannian case. This is done using geometric methods, and studying local dynamics of seque…

2009-09-01abs ↗pdf ↗

Proves an analytical analogue of Morse's lemma for gradient fields near critical points.

problem Understanding the behavior of gradient fields near critical points of Morse functions.
method Proves an analytical analogue of Morse's lemma showing unique linear vector fields.
result Shows that gradient fields near critical points have a natural standard form.

Some observations about the local and global generality of gradient Kahler Ricci solitons are made, including the existence of a canonically associated holomorphic volume form and vector field, the local generality of solutions with a prescribed holomorphic volume form and vector field, and the existence of Poincare co…

2004-07-27abs ↗pdf ↗

Following the analogies between 3-dimensional topology and number theory, we study an idèlic form of class field theory for 3-manifolds. For a certain set K\mathcal{K} of knots in a 3-manifold MM, we first present a local theory for each knot in K\mathcal{K}, which is analogous to local class field theory, and then,…

2013-11-21abs ↗pdf ↗

In this paper we prove local analytic hypoellipticity for a degenerate sum of squares of complex vector fields generalizing those of Kohn in "Hypoellipticity and Loss of Derivatives". Kohn's article is to appear in the Annals of Mathematics with an appendix by Derridj and Tartakoff proving local analyticity in that cas…

2005-05-30abs ↗pdf ↗

Study examines Wang-Yau quasi-local energy in strong fields near apparent horizons.

problem Examining the behavior of Wang-Yau quasi-local energy near apparent horizons in strong fields.
method Analyzing the limit of the Wang-Yau quasi-local energy as a spacelike surface approaches an apparent horizon, considering bounded coordinate functions and spacelike mean curvature.
result The limit of the Wang-Yau quasi-local energy falls into two cases: it blows up or remains finite, depending on whether the horizon can be isometrically embedded into R3R^3.

Develops a new exponential map for time-varying vector fields.

problem Lack of global flows for general time-varying vector fields.
method Categorical development of spaces of vector fields and flows, allowing for systematic localisation.
result Derives the homeomorphism of the exponential map for vector fields with measurable time-dependence.

Builds geometric structures for algebraic groups over real closed fields.

problem Characterizing and decomposing algebraic groups over specific valued fields.
method Real algebraic geometry to construct and analyze affine buildings.
result Computed stabilizers and obtained group decompositions.

Paper compares algebraic quantum field theories and factorization algebras on Lorentzian manifolds.

problem Relationship between algebraic quantum field theories and factorization algebras on Lorentzian manifolds.
method Developed functorial constructions under natural hypotheses, including local constancy and descent axioms.
result Equivalence theorem between algebraic quantum field theories and prefactorization algebras.

New proof shows all conformal vector fields on complex hyperbolic space are Killing.

problem Proving all conformal vector fields on complex hyperbolic space are Killing.
method Local, analytic, and constructive approach using Lie group model and partial differential equations.
result Every conformal vector field on complex hyperbolic space is Killing.

The paper proves properties of Brauer equivalent number fields and applies them to geometric spaces.

problem Understanding properties of Brauer equivalent number fields.
method Analyzes Brauer groups and arithmetic locally symmetric spaces.
result Constructs incommensurable spaces with identical geodesic surfaces.

Efficiently visualizes uncertainty in local divergence of 2D vector fields.

problem Uncertainty in vector field data leads to inaccurate divergence computations.
method Closed-form approach for highly efficient and accurate uncertainty visualization of local divergence, assuming independently Gaussian-distributed vector uncertainties.
result Significantly enhanced efficiency and accuracy of our algorithms over classical MC approach.