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48 results for Einstein-Yang-Mills fields

Study Einstein-Yang-Mills fields on specific manifolds, proving field deformations.

problem Deforming Einstein-Yang-Mills fields over conformally compact manifolds.
method Deformation theory using 00-calculus of Mazzeo and Melrose.
result Any small perturbation of boundary data can be realized as an Einstein-Yang-Mills field.

Proves local existence and extension principle for Einstein Yang--Mills system with spherical symmetry.

problem Local existence and stability of the spherically symmetric Einstein Yang--Mills system.
method Employed an L2L^2-based method to prove local existence and establish an extension principle.
result Established local existence and extension principle for the SSEYM with H1H^1 data.

Proves stability of Minkowski space-time in Einstein-Yang-Mills system.

problem Stability of Minkowski space-time governed by Einstein-Yang-Mills system.
method Null frame decomposition, well-posedness of Cauchy development, convergence to Minkowski space-time.
result Exterior stability of Minkowski space-time in Lorenz gauge without spherical symmetry.

The paper explores Kaluza-Klein theories without assuming a fibration structure.

problem Exploring Kaluza-Klein theories without assuming a fibration structure.
method Variational formulations of gauge theories and Einstein--Yang-Mills equations.
result Classical solutions allow the construction of a manifold XX of dimension 4 as physical space-time, leading to solutions of the Einstein--Yang-Mills systems.

Proves stability of Minkowski space-time for Einstein-Yang-Mills equations.

problem Stability of Minkowski space-time for perturbations governed by Einstein-Yang-Mills equations.
method Proves exterior energy estimates for tensorial non-linear wave equations in Minkowski space-time.
result Proves exterior stability of Minkowski space-time for Einstein-Yang-Mills equations.

Study the deformation theory of Einstein-Yang-Mills system on compact manifolds.

problem Deformation theory of Einstein-Yang-Mills system on compact manifolds.
method Slice theorem, linearization analysis, essential deformation characterization.
result Realize moduli space of Einstein-Yang-Mills pairs as an analytic set in a finite-dimensional tame Fréchet manifold.

Study classifies Einstein-Yang-Mills spaces in 4D symmetric spaces.

problem Classifying Lorentzian symmetric spaces with Einstein-Yang-Mills properties.
method Classification based on invariant metric connections and diagonal metrics.
result Four-dimensional symmetric spaces with nontrivial isotropy groups are classified.

Starting with the most general four-dimensional spacetime possessing two commuting Killing vectors and a nontrivial Killing tensor, we analytically integrate Einstein-Yang-Mills equations for a completely arbitrary gauge group. It is assumed that the gauge field inherits the symmetries of the background and is aligned …

2017-07-14abs ↗pdf ↗

Stability of Minkowski space-time in Einstein-Yang-Mills system proven.

problem Stability of Minkowski space-time in Einstein-Yang-Mills system.
method Null frame decomposition, wave coordinates, dispersive estimates.
result Solutions converge to zero Yang-Mills curvature and Minkowski space-time.

Developed a new symmetric hyperbolic formulation for Einstein-Yang-Mills system.

problem Future stability of solutions of the Einstein-Yang-Mills system with arbitrary dimension.
method Tensorial symmetric hyperbolic formulation and local well-posedness for Cauchy problem.
result Established local well-posedness for the Cauchy problem of EYM equations in the temporal gauge.

Stability of Minkowski space-time in higher dimensions proven for arbitrary small perturbations.

problem Stability of Minkowski space-time solution to Einstein-Yang-Mills equations in higher dimensions.
method Global stability proof for arbitrary small perturbations using wave coordinates and gauge invariant norms.
result Global stability of Minkowski space-time in higher dimensions n5n \geq 5 for arbitrary small perturbations.

In this paper, we prove a convergence theorem for sequences of Einstein Yang-Mills systems on U(1)U(1) -bundles over closed nn-manifolds with some bounds for volumes, diameters, L2L^{2}-norms of bundle curvatures and Ln2L^{\frac{n}{2}}-norms of curvature tensors. This result is a generalization of earlier compactness the…

2012-01-01abs ↗pdf ↗

Let PP be a principal U(1)-bundle over a closed manifold MM. On PP, one can define a modified version of the Ricci flow called the Ricci Yang-Mills flow, due to these equations being a coupling of Ricci flow and the Yang-Mills heat flow. We use maximal regularity theory and ideas of Simonett concerning the asymptoti…

2008-12-10abs ↗pdf ↗

For any positive integer nn and any Lie group G\mathfrak{G}, given a definite symmetric bilinear form on Rn\mathbb{R}^n and an Ad\hbox{Ad}-invariant scalar product on the Lie algebra of G\mathfrak{G}, we construct a variational problem on fields defined on an arbitrary oriented (n+dimG)(n+\hbox{dim}\mathfrak{G})-dimension…

2018-09-10abs ↗pdf ↗

The paper introduces a trilinear functional to recover torsion in spectral triples.

problem Recovering torsion in noncommutative spectral triples.
method Introduces a trilinear functional for spectral triples and demonstrates its application to recover torsion.
result The trilinear functional recovers the torsion of the linear connection in canonical spectral triples.

Proves energy estimates for tensorial wave equations, decoupling components for stability proof.

problem Proving stability of (1+3)(1+3)-Minkowski space-time with various non-linearities.
method Decouples energy estimates for tensorial wave equations, exploiting tensorial structure and Lie derivatives.
result Decoupled energy estimates for tensorial solutions, allowing new stability proofs.

Existence of an infinite sequence of harmonic maps between spheres of certain dimensions was proven by Bizon and Chmaj. This sequence shares many features of the Bartnik-McKinnon sequence of solutions to the Einstein-Yang-Mills equations as well as sequences of solutions that have arisen in other physical models. We ap…

1999-12-01abs ↗pdf ↗

Study proves global existence and decay for complex wave equations.

problem Global existence and decay for quasilinear wave equations with weak-null condition.
method Novel decoupling of higher order energy estimates, focusing on tangential components.
result Established global existence and decay for solutions with small data.

Braided vector fields on spatial subdomains homeomorphic to the cylinder play a crucial role in applications such as solar and plasma physics, relativistic astrophysics, fluid and vortex dynamics, elasticity, and bio-elasticity. Often the vector field's topology -- the entanglement of its field lines -- is non-trivial,…

2019-09-17abs ↗pdf ↗

The paper proves that certain modified conformal vector fields are trivial on compact and non-compact manifolds.

problem Proving triviality of modified conformal vector fields on Riemannian manifolds.
method Analyzing properties of homothetic, conformal, and gradient vector fields on compact and non-compact manifolds.
result Established conditions under which mm-modified conformal vector fields are trivial.

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 ↗

The paper establishes a connection between force-free fields and conformally geodesic fields.

problem Understanding the relationship between force-free fields and conformally geodesic fields.
method Developed an equivalence between force-free fields and conformally geodesic fields, generalized to arbitrary dimensions.
result Established that stationary points of hierarchies of L2L^2 and L1L^1-optimization problems are related by a conformal change of metric.

Vector fields invariant under Lie group action are finitely generated by polynomial fields.

problem Understanding invariant vector fields under Lie group actions.
method Analyzing the module of smooth vector fields invariant under a linear action of a compact Lie group.
result The module of invariant vector fields is finitely generated by polynomial fields.

The position vector field x is the most elementary and natural geometric object on a Euclidean submanifold MM. The position vector field plays very important roles in mathematics as well as in physics. Similarly, the tangential component x^T of the position vector field is the most natural vector field tangent to the …

2017-12-24abs ↗pdf ↗

Study on vector fields on Lie groups reveals surprising algebraic coincidences.

problem Characterizing vector fields on Lie groups with Riemannian metrics.
method Algebraic and geometric analysis of left-invariant vector fields on nilpotent Lie groups.
result Spaces of Killing, one-harmonic, and conformal vector fields coincide with the center of the Lie algebra on nilpotent Lie groups.

This work discovers latent field effects governing interacting dynamical systems.

problem Discovering field effects governing interacting dynamical systems.
method Proposes neural fields to learn latent force fields from observed dynamics, disentangling local object interactions and global field effects.
result Accurately discovers latent field effects in various dynamical systems.

Study proves conformal vector fields on certain Finsler manifolds are Killing fields.

problem Characterizing conformal vector fields on compact homogeneous Finsler manifolds.
method Analyzes properties of conformal vector fields and homogeneous Finsler metrics.
result Conformal vector fields on compact homogeneous Finsler manifolds are Killing fields.

For a submanifold M in a Euclidean space, the tangential component x^T of the position vector field x of M is the most natural vector field tangent to the Euclidean submanifold, called the canonical vector field of M. In this article, first we prove that the canonical vector field of every Euclidean submanifold is alwa…

2018-01-22abs ↗pdf ↗

Study magnetic field evolution in inhomogeneous axion stars.

problem Magnetic field evolution in axion stars with spatial inhomogeneity.
method Derived new induction equation for magnetic field, analyzed CS waves interactions, and considered compact domain effects.
result Spatial inhomogeneity of pseudoscalar field significantly affects magnetic field evolution.

In this paper we form a general conservation law that unifies a class of physics field theories. For this we first introduce the notion of a general field as a formal sum differential forms on a Minkowski manifold. Thereafter, we employ the action principle to define the conservation law for such general fields. By con…

2019-08-28abs ↗pdf ↗

A Ricci soliton (M,g,v,λ)(M,g,v,λ) on a Riemannian manifold (M,g)(M,g) is said to have concurrent potential field if its potential field vv is a concurrent vector field. Ricci solitons arisen from concurrent vector fields on Riemannian manifolds were studied recently in \cite{CD2}. The most important concurrent vector field is …

2014-10-19abs ↗pdf ↗

Challenge to separate Earth's magnetic field from vehicle's magnetic field for accurate navigation.

problem Separate Earth's magnetic field from vehicle's magnetic field for accurate magnetic navigation.
method Use machine learning (ML) and integrate physics of magnetic navigation (SciML) to remove aircraft magnetic field from total magnetic field.
result A model can be constructed to effectively remove aircraft magnetic field from the dataset.

New field invariant refines real spectrum and relates to absolute Galois group.

problem Understanding field invariants related to absolute Galois groups.
method Introducing Artin-Schreier quandles and computing their properties for different types of fields.
result Artin-Schreier quandles provide relations between fields and their absolute Galois groups.

Study biharmonic vector fields and unit vector fields on Riemannian manifolds.

problem Determine the equivalence of biharmonicity and harmonicity for vector fields and unit vector fields on Riemannian manifolds.
method Analyze biharmonic vector fields and unit vector fields on (M,g)(M,g) with pseudo-Riemannian gg-natural metrics on TMTM and T1MT_1M.
result Contrary to Sasaki metric, biharmonicity and harmonicity are not equivalent for large classes of gg-natural metrics on TMTM.

This short report establishes some basic properties of smooth vector fields on product manifolds. The main results are: (i) On a product manifold there always exists a direct sum decomposition into horizontal and vertical vector fields. (ii) Horizontal and vertical vector fields are naturally isomorphic to smooth famil…

2011-06-05abs ↗pdf ↗

Defines quaternionic k-vector fields on quaternionic Kähler manifolds.

problem No specific problem stated; focuses on definition and properties.
method Introduced a modified Dirac operator to define quaternionic k-vector fields.
result Calculated the dimension of quaternionic k-vector fields on HPn\mathbb{H}P^n.