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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.

169,181 papers · 148 categories

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13253850 · Jun 202619922001200920182026
48 results for Ricci pseudosymmetric

The paper examines Ricci solitons on specific types of (LCS)n(LCS)_n-manifolds.

problem Investigating Ricci solitons on (LCS)n(LCS)_n-manifolds.
method Analyzing various types of Ricci pseudosymmetric (LCS)n(LCS)_n-manifolds.
result Conditions for Ricci solitons on specific (LCS)n(LCS)_n-manifolds.

In the literature, there are two different notions of pseudosymmetric manifolds, one by Chaki [7] and other by Deszcz [16], and there are many papers related to these notions. The object of the present paper is to deduce necessary and sufficient conditions for a Chaki pseudosymmetric [7] (resp. pseudo Ricci symmetric […

2014-05-09abs ↗pdf ↗

The curvature properties of Robinson-Trautman metric have been investigated. It is shown that Robinson-Trautman metric admits several kinds of pseudosymmetric type structures such as Weyl pseudosymmetric, Ricci pseudosymmetric, pseudosymmetric Weyl conformal curvature tensor etc. Also it is shown that the difference $R…

2017-01-22abs ↗pdf ↗

The paper investigates various generalizations of semisymmetric and pseudosymmetric manifolds.

problem Exploring different curvature tensor generalizations of semisymmetric and pseudosymmetric manifolds.
method Systematic review and examination of geometric structures with physical examples.
result Proper existence of various geometric structures, including Ricci pseudosymmetric manifolds.

For compact Kählerian manifolds, the holomorphic pseudosymmetry reduces to the local symmetry if additionally the scalar curvature is constant and the structure function is non-negative. Similarly, the holomorphic Ricci-pseudosymmetry reduces to the Ricci-symmetry under these additional assumptions. We construct exampl…

2009-03-29abs ↗pdf ↗

The paper examines curvature properties of a specific magnetic spacetime metric.

problem Investigating the geometric properties of Melvin magnetic spacetime metric.
method Analyzing a Melvin type static, cylindrically symmetric spacetime metric in Weyl form, considering curvature conditions and tensor properties.
result The Melvin magnetic metric is pseudosymmetric and satisfies the Roter type condition.

The paper explores symmetries in Kähler manifolds using Ricci tensor properties.

problem Investigating symmetries in Kähler manifolds involving Ricci tensor.
method Analyzing properties of Kähler-Einstein spaces and their generalizations.
result Clarified the geometric role of holomorphic Ricci pseudosymmetry and established new criteria for Kähler manifolds to be Einstein.

The paper examines curvature properties of Vaidya metric, a generalization of Schwarzschild solution.

problem Investigating curvature properties of Vaidya metric.
method Analyzing Vaidya metric under different curvature conditions and comparing with Ludwig-Edgar pure radiation metric.
result Vaidya metric exhibits various curvature properties including pseudosymmetric type conditions and is Ricci simple.

The paper finds conditions for pseudosymmetric spacetimes to be perfect fluids.

problem Characterizing pseudosymmetric spacetimes as perfect fluids.
method Analyzes generalized Robertson-Walker spacetimes, conformally flat spacetimes, and dust fluids.
result Conditions for pseudosymmetric spacetimes to be perfect fluids are established.

Definition of (Ta,Tb)({\cal T}_{a},{\cal T}_{b})-pseudosymmetric semi-Riemannian manifold is given. (Ta,Tb)({\cal T}_{a},{\cal T}_{b})-pseudosy mmetric (N(k),ξ)(N(k),ξ)-semi-Riemannian manifolds are classified. Some results for Ta{\cal T}_{a}-pseudosymmetric (N(k),ξ)(N(k),ξ)-semi-Riemannian manifolds are obtained. $({\cal T}_{a},{\cal T}_{b…

2012-02-29abs ↗pdf ↗

In this paper we study the 3-dimensional (ε)(\varepsilon) -para Sasakian manifolds. We obtain an necessary and sufficient condition for an (ε)(\varepsilon ) -para Sasakian 3 -manifold to be an indefinite space form. We show that a Ricci-semi-symmetric (ε)(\varepsilon) -para Sasakian 3 -manifold is an indefinite space form…

2009-11-25abs ↗pdf ↗

The main objective of the present paper is to investigate the curvature properties of generalized pp-wave metric. It is shown that generalized pp-wave spacetime is Ricci generalized pseudosymmetric, 2-quasi-Einstein and generalized quasi-Einstein in the sense of Chaki. As a special case it is shown that pp-wave spaceti…

2017-02-24abs ↗pdf ↗

The paper examines geometric properties of a specific black hole spacetime.

problem Curvature properties of a Hayward black hole spacetime.
method Analyzes the curvature properties of Hayward black hole spacetime using Einstein field equations.
result The Hayward black hole spacetime is an Einstein manifold and exhibits various types of pseudosymmetry.

The study characterizes symmetries in Kaehler manifolds.

problem Understanding symmetries in Kaehler manifolds.
method Analyzing specific types of Kaehler manifolds: constant holomorphic sectional curvature, semisymmetric, and holomorphically pseudosymmetric.
result Characterization results and geometric interpretation of the complex Tachibana tensor.

Geodesic mappings found in a specific type of warped product manifolds.

problem Characterizing geodesic mappings in a particular class of Roter spaces.
method Identifying a specific class of Roter type warped product manifolds and proving geodesic mappings onto another Roter type warped product manifold.
result Both geodesically related manifolds are pseudosymmetric of constant type.

Investigates geometric properties of Bardeen black hole spacetime.

problem Examines curvature properties of Bardeen black hole spacetime.
method Analyzes pseudosymmetry, pseudosymmetric Weyl curvature, and recurrent structures.
result Bardeen spacetime is a manifold of pseudosymmetry Weyl curvature and satisfies special recurrent like structure.

Study geometric properties and physical applications of mixed quasi-Einstein spacetime.

problem Characterize geometric and physical properties of mixed quasi-Einstein spacetime.
method Analyze geometric conditions and curvature tensors on mixed quasi-Einstein and nearly quasi-Einstein manifolds.
result Establish conditions for specific curvature tensors and spacetime structures.

The paper classifies certain N(κ)N(κ)-contact metric manifolds under specific conditions.

problem Investigating properties of N(κ)N(κ)-contact metric manifolds.
method Analyzing manifolds under specific curvature conditions.
result Weyl-pseudosymmetric N(κ)N(κ)-contact metric manifolds are either locally isometric to En+1(0)imesSn(4)E^{n+1}(0) imes S^{n}(4) or ηη-Einstein.

The paper studies (ε)(ε)-para-Sasakian 3-manifolds with Z\mathcal{Z}-symmetry conditions.

problem Characterizing (ε)(ε)-para-Sasakian 3-manifolds under Z\mathcal{Z}-symmetry conditions.
method Examining various Z\mathcal{Z}-symmetric conditions on (ε)(ε)-para-Sasakian 3-manifolds.
result Characterizations of Z\mathcal{Z}-symmetric, Z\mathcal{Z}-semisymmetric, Z\mathcal{Z}-pseudosymmetric, and projectively Z\mathcal{Z}-semisymmetric conditions.

Study explores geometric properties of Vaidya-Bonner-de Sitter spacetime.

problem Exploring geometric properties of Vaidya-Bonner-de Sitter spacetime.
method Analyzing conformal curvature, conharmonic curvature, and other curvatures.
result VBdS spacetime exhibits various pseudosymmetric structures and geometric features.

Study ancient Ricci flows with nonnegative Ricci curvature and their asymptotic geometry.

problem Understanding the asymptotic geometry of ancient Ricci flows with nonnegative Ricci curvature.
method Analyze tangent flows at infinity and use estimates for noncollapsed F-limit metric solitons.
result Two dichotomy theorems for ancient Ricci flows: either the asymptotic volume ratio is zero or every tangent flow is a Ricci flat cone.

Survey paper analyzes curvature estimates for 4D gradient Ricci solitons.

problem Analyzing curvature estimates for different types of 4D gradient Ricci solitons.
method Comparison and new estimates provided for 4D gradient steady Ricci solitons.
result Sharp curvature estimate RmCR|Rm|\le C R for gradient steady Ricci solitons with positive Ricci curvature.

Study on transverse Ricci solitons on compact foliated manifolds.

problem Characterizing transverse Ricci solitons on compact foliated manifolds.
method Investigation of self-similar solutions of the transverse Ricci flow, analysis of taut Riemannian foliations.
result Established relations between taut Riemannian foliations and transverse Ricci solitons, found examples of transverse Ricci solitons.

The paper examines how parabolic frequency behaves under Ricci flow and Ricci-harmonic flow on manifolds.

problem Understanding the behavior of parabolic frequency under Ricci flow and Ricci-harmonic flow.
method Investigates the monotonicity of parabolic frequency for solutions of linear and heat equations with bounded curvatures.
result Establishes monotonicity results for parabolic frequency under specific curvature conditions.

The paper explores almost Ricci solitons on Finsler spaces, proving conditions for their existence.

problem Characterizing almost Ricci solitons on Finsler measure spaces.
method Introducing and investigating gradient almost Ricci solitons, proving conditions for existence.
result Conditions for the existence of gradient almost Ricci solitons on Finsler measure spaces.

Study on Ricci-Bourguignon solitons and almost solitons, generalizing previous results.

problem Analyzing solitons and almost solitons in the context of Ricci-Bourguignon flow.
method Generalizing results for Ricci solitons and introducing Ricci-Bourguignon almost solitons, proving results and deriving integral formulas.
result Compact gradient Ricci-Bourguignon almost solitons with constant scalar curvature or conformal associated vector field are isometric to Euclidean spheres.