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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.

169,291 papers · 148 categories

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56113169225 · May 202619922001200920182026
48 results for projective unit tangent bundle

Researchers found all invariant contact structures on tangent sphere bundles of compact symmetric spaces.

problem Identifying all invariant contact metric structures on tangent sphere bundles of compact rank-one symmetric spaces.
method Explicitly obtained all structures, distinguishing K-contact, Sasakian, and 3-Sasakian structures.
result There is a unique Sasakian-Einstein metric on tangent sphere bundles of spheres and real projective spaces.

The study provides a lower bound for knot complement volumes related to geodesics.

problem Understanding the volumes of knot complements associated with geodesics.
method Analyzing the volumes of knot complements in the projective unit tangent bundle of a surface.
result A lower bound for the volume of knot complements relative to the number of geodesic arcs.

The paper finds lower bounds for volumes of complex geometric structures.

problem Estimating the volume of complex geometric structures.
method Reduction to a counting problem in the unit tangent bundle, solved using exponential multiple mixing for the geodesic flow.
result First known lower bound for the volume of these manifolds in terms of curve length.

Study on Ricci solitons on tangent and unit tangent bundles.

problem Characterizing Ricci solitons on tangent and unit tangent bundles.
method Analyzing pseudo-Riemannian gg-natural metrics and their Ricci soliton properties.
result Classification of conformal vector fields and existence of non-Einstein Ricci solitons.

We show, using two different approaches, that there exists a family of Riemannian metrics on the tangent bundle of a two-sphere, which induces metrics of constant curvature on its unit tangent bundle. In other words, given such a metric on the tangent bundle of a two-sphere, the Hopf map is identified with a Riemannian…

2008-08-12abs ↗pdf ↗

We study the geometric properties of the base manifold for the unit tangent bundle satisfying the ηη-Einstein condition with the standard contact metric structure. One of the main theorems is that the unit tangent bundle of 4-dimensional Einstein manifold, equipped with the canonical contact metric structure, is ηη-E…

2007-08-10abs ↗pdf ↗

The paper classifies surfaces with pseudo-effective tangent bundles.

problem Understanding projective manifolds with pseudo-effective tangent bundles.
method Developed singular hermitian metrics on vector bundles and applied to projective manifolds.
result Projective manifolds with pseudo-effective tangent bundles admit a smooth fibration to a flat projective manifold.

Projective manifolds with specific bundles are isomorphic to simpler spaces.

problem Characterizing projective manifolds with tangent bundles containing strictly nef subsheaves.
method Analyzing the structure of the tangent bundle and using properties of strictly nef subsheaves.
result Projective manifolds with the described bundles are isomorphic to projective bundles over hyperbolic manifolds or projective spaces.

Researchers create metrics on hyperbolic space's tangent bundle.

problem Constructing metrics on the unit tangent bundle of hyperbolic space.
method Using Hopf coordinates and Busemann functions, they constructed a flow-invariant metric.
result The unit tangent bundle of hyperbolic space is a homogeneous space under specific groups.

The paper proves Morse estimates for translated points on unit tangent bundles.

problem Estimating the minimal number of translated points in unit tangent bundles.
method Analyzing contactomorphisms of SMSM that lift diffeomorphisms of MM homotopic to identity.
result Proves the existence of sequences (pn,tn)(p_n,t_n) with tno+t_n o+\infty for a large class of manifolds.

In this paper we study a Riemanian metric on the tangent bundle T(M)T(M) of a Riemannian manifold MM which generalizes Sasaki metric and Cheeger Gromoll metric and a compatible almost complex structure which together with the metric confers to T(M)T(M) a structure of locally conformal almost Kählerian manifold. This is th…

2005-11-15abs ↗pdf ↗

The paper studies smooth projective varieties with strictly nef tangent bundles and their properties.

problem Understanding smooth projective varieties with strictly nef tangent bundles.
method Analyzing the tangent bundle properties and using rational connectedness.
result Smooth projective varieties with strictly nef tangent bundles are rationally connected.

Study geodesics and F-geodesics on tangent bundles over para-Kähler-Norden manifolds.

problem Investigate geodesics and F-geodesics on tangent bundles.
method Investigate geodesics and F-geodesics on tangent bundles and φ-unit tangent bundles equipped with φ-Sasaki metric over para-Kähler-Norden manifolds.
result Investigate and analyze geodesics and F-geodesics on tangent bundles.

Geodesics of the same type on curved surfaces are randomly distributed.

problem Distribution of geodesics of the same type on negatively curved surfaces.
method Asymptotic equidistribution with respect to a measure on the unit tangent bundle.
result Geodesics of the same type are asymptotically equidistributed with respect to a measure mS\mathfrak{m}^S.

Given a Hopf fibration of a round sphere by parallel great subspheres, we prove that the projection map to the base space is, up to isometries of domain and range, the unique Lipschitz constant minimizer in its homotopy class. Similarly, given a Hopf fibration of a round sphere by parallel great circles, we view a unit…

2010-09-28abs ↗pdf ↗

The paper characterizes projective spaces and quadrics using strictly nef bundles.

problem Characterizing projective spaces and quadrics using geometric properties of bundles.
method Analyzing strictly nef bundles on smooth projective varieties and curves.
result Strictly nef bundles on smooth projective varieties and curves have specific geometric properties.

Study harmonicity on tangent bundles with a specific metric.

problem Harmonicity of canonical projection and vector field in tangent bundles.
method Investigate harmonicity on tangent bundles with a Berger-type deformed Sasaki metric.
result Characterized conditions for harmonicity of the canonical projection and vector field.

Study on triviality of tangent and generalized tangent bundles of manifolds.

problem Triviality of tangent and generalized tangent bundles of manifolds.
method Analyzing relations between tangent bundle TMTM and generalized tangent bundle TM=TMTM\mathbb{T}M = TM\oplus T^*M of manifolds.
result The generalized tangent bundle of a parallelizable manifold is trivial, but the converse is not always true.

One says that a smooth manifold M is a pseudo-Riemannian manifold of signature (p,q) if the tangent bundle TM is equipped with a smooth non-degenerate symmetric inner product g of signature (p,q). Similarly one says that M is an affine manifold if TM is equipped with a torsion free connection. One says g is Osserman if…

2007-08-09abs ↗pdf ↗

Proves uniqueness of tangent cones for specific types of connections.

problem Uniqueness of tangent cones for Hermitian Yang-Mills connections with isolated singularities.
method Simple direct proof using μ-polystable holomorphic bundles over P^n-1.
result Uniqueness of tangent cones for singular projectively Hermitian Yang-Mills connections.

We prove that the geodesic flow on the unit tangent bundle to a hyperbolic 2-orbifold is left-handed if and only if the orbifold is a sphere with three conic points. As a consequence, on the unit tangent bundle to a 3-conic sphere, the lift of every finite collection of closed geodesics that is zero in integral homolog…

2015-01-13abs ↗pdf ↗

Unified study of surfaces using Clifford algebras.

problem Classifying immersed surfaces in various manifolds.
method Using Clifford algebras to construct formalism for immersed bilegendrian surfaces.
result Full classifications of immersed bilegendrian surfaces in the unit tangent bundle of the 3-sphere.

The paper proves structures for complex projective varieties with certain tangent bundle properties.

problem Characterizing complex projective varieties based on properties of their tangent bundles.
method Analyzing the positivity of exterior powers of tangent bundles and using étale covers.
result Complex projective varieties with nef exterior powers of tangent bundles are Fano fiber spaces over Abelian varieties.

Study numerically flat foliations on Kähler manifolds, proving new splitting theorems.

problem Understanding foliations with numerically flat tangent bundles on Kähler manifolds.
method Analyzing the structure of foliations on compact Kähler manifolds, extending earlier results.
result Smooth foliations with numerically flat tangent bundles induce a decomposition of the ambient manifold's tangent bundle.

Reconstructs tangent bundle of complex projective plane using tropical geometry.

problem Reconstructing the holomorphic tangent bundle of the complex projective plane.
method Introduced tropical Lagrangian multi-section and used it to reconstruct the tangent bundle.
result Performed reconstruction of TP2\mathbb{T}_{\mathbb{P}^2} from tropical Lagrangian multi-section.

The paper derives new Gauss-Bonnet formulas for frontal bundles over surfaces with boundary.

problem Deriving new formulas for coherent tangent bundles over surfaces with boundary.
method Defining frontal bundles and applying Gauss-Bonnet theorems to derive formulas.
result Four new Gauss-Bonnet type formulas for frontal bundles are derived.

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.

Study tangent cones of Hermitian-Yang-Mills connections and their relation to vector bundles.

problem Understanding the tangent cones of Hermitian-Yang-Mills connections at isolated singularities.
method Relate tangent cones to the complex algebraic geometry of reflexive sheaves and vector bundles.
result Prove conjecture about the tangent cone being uniquely determined by the double dual of the associated graded object of a Harder-Narasimhan-Seshadri filtration.