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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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2865738591,145 · Jun 202019922001200920182026
48 results for general position theorems

Proves a higher-order positive energy theorem for stationary solutions in fourth-order gravity.

problem Proving a positive energy theorem for fourth-order gravitational theories.
method Analyzes geometric analysis intersections and links to QQ-curvature.
result Establishes a positive energy theorem for stationary solutions in fourth-order gravity, similar to the classical ADM theorem.

The paper proves a theorem for generalized p-Kähler manifolds.

problem Characterization of compact generalized p-Kähler manifolds.
method Proof based on duality between closed and exact positive forms and currents.
result Complete unified proof of Characterization Theorem for compact generalized p-Kähler manifolds.

Extends Perelman's theorem to positive intermediate curvature conditions.

problem Positive intermediate curvature conditions and their implications.
method Generalization of Perelman's gluing theorem to positive intermediate curvature conditions.
result Observer moduli space can have non-trivial higher homotopy groups.

Paper extends positive energy theorem to anti-de Sitter spacetimes.

problem Proving positive energy theorem for weighted anti-de Sitter spacetimes.
method Generalized positive energy theorem for 3D anti-de Sitter initial data sets.
result Positive energy theorem proved for weighted anti-de Sitter spacetimes.

Unified positive mass theorem and Dirac operator study on weighted manifolds.

problem Establishing a unified positive mass theorem for weighted manifolds and smooth metric measure spaces.
method Analyzing Dirac operators on warped product manifolds and applying results to the positive mass theorem.
result Equivalence of weighted positive mass theorem to usual positive mass theorem.

The Positive Mass Theorem for special singular initial data.

problem Proving the positive mass theorem for data with a codimension one singularity.
method Using asymptotically flat spin initial data sets with matching Bartnik data condition involving spacetime rotations.
result Established a spacetime positive mass theorem and rigidity statement.

Proves positive mass theorem for AF spin manifolds with conical singularities.

problem Proving the positive mass theorem for singular metrics on AF manifolds.
method Analyzes AF spin manifolds with isolated conical singularities, allowing topological singularities.
result Proves the positive mass theorem for AF spin manifolds with conical singularities.

The paper extends the spacetime positive mass theorem to multiple time dimensions.

problem Proving the nonnegativity of mass in spacetimes with multiple time dimensions.
method Generalizing the spacetime positive mass theorem to include multiple time dimensions and showing mass nonnegativity through energy inequalities.
result Equality in the energy inequality implies a foliation by flat submanifolds.

Proves effective positive mass theorem for AF manifolds and singular spaces.

problem Proves positive mass theorem for AF manifolds with singularities.
method Dimension reduction techniques, bypassing N. Smale's regularity theorem.
result Effective positive mass theorem for AF manifolds of dimension n8n\leq 8 with singularities.

Vanishing theorems show holomorphic tensor fields on certain Kähler manifolds are trivial.

problem Understanding properties of holomorphic tensor fields on Kähler manifolds.
method Established vanishing theorems for uniformly rational connected (RC) kk-positive Hermitian holomorphic vector bundles.
result Holomorphic tangent bundles of Kähler manifolds with positive kk-Ricci curvature are uniformly RC kk-positive.

In this paper, we develop a general study of contributions at infinity of Bochner-Weitzenböck-type formulas on asymptotically flat manifolds, inspired by Witten's proof of the positive mass theorem. As an application, we show that similar proofs can be obtained in a much more general setting as any choice of an irreduc…

2014-01-23abs ↗pdf ↗

Proves positive mass theorems for specific ALF and ALG manifolds.

problem Proving positive mass theorems for ALF and ALG manifolds.
method Reduces the problem to non-existence of positive scalar curvature metrics on closed manifolds.
result Shows that incompressible conditions for S1\mathbb S^1 and T2\mathbb T^2 are sufficient for nonnegativity of mass.

We observe that an analogue of the Positive Mass Theorem in the time-symmetric case for three-space-time-dimensional general relativity follows trivially from the Gauss-Bonnet theorem. In this case we also have that the spatial slice is diffeomorphic to $\Real^2$.

2012-02-28abs ↗pdf ↗

The paper proves a mass theorem for manifolds with boundary.

problem Proving a positive mass theorem for manifolds with boundary.
method Derives a positive mass theorem for asymptotically flat manifolds with boundary using the conformal Green's function and Laplacian operator.
result Derives a new inequality relating mass and harmonic functions.

The hyperbolic positive energy theorem links causal properties to energy-momentum vectors in asymptotically hyperbolic spaces.

problem Establishing the causal-future-directed character of energy-momentum vectors in hyperbolic spaces.
method Analyzing nn-dimensional asymptotically hyperbolic Riemannian manifolds with spherical conformal infinity, focusing on the dominant energy condition.
result The causal-future-directed character of the energy-momentum vector can be traced back to that of asymptotically Euclidean initial data sets.

The paper proves conditions for positive scalar curvature metrics on manifolds with incompressible hypersurfaces.

problem Conditions for the existence of metrics with positive scalar curvature on manifolds with incompressible hypersurfaces.
method Analyzing surgeries and applying the positive mass theorem with incompressible conditions.
result Establishes positive mass theorem with incompressible conditions for specific manifolds.

In this paper, we give a new generalization of positive sectional curvature called positive weighted sectional curvature. It depends on a choice of Riemannian metric and a smooth vector field. We give several simple examples of Riemannian metrics which do not have positive sectional curvature but support a vector field…

2014-10-06abs ↗pdf ↗

Study k-positive surface group representations and their degenerations.

problem Understanding the behavior of surface group representations under degenerations.
method Introduced k-positive representations and studied their degenerations using a limit theorem for positively ratioed representations.
result Degenerations of k-positive representations can lead to limits that are at least (k-3)-positive and irreducible limits are (k-1)-positive.

Positive mass theorem for non-smooth metrics on flat manifolds with corners.

problem Proving a positive mass theorem for non-smooth metrics on asymptotically flat manifolds with non-compact boundary.
method Proves a positive mass theorem for metrics that are only continuous across a compact hypersurface.
result Obtains a positive mass theorem on manifolds with non-compact corners.

The positive energy theorem is proven for certain spacetimes with irregular curvature.

problem Proving the positive energy theorem for spacetimes with irregular curvature.
method Weak asymptotically anti-de Sitter initial data sets with distributional curvature under weak dominant energy condition.
result Positive energy theorem established for weakly irregular spacetimes.

The paper defines positivity for singular metrics on vector bundles and proves related theorems.

problem Positivity of singular Hermitian metrics for holomorphic vector bundles.
method The method of Berndtsson and Lempert, along with a Berndtsson-type positivity theorem for holomorphic vector bundles.
result Sharp L2L^2 extension theorem for holomorphic vector bundles.

The paper constructs Ricci-positive metrics on complex manifolds.

problem Creating Ricci-positive metrics on connected sums of products of spheres.
method Two new technical theorems are introduced: a gluing construction for Ricci-positive manifolds with corners and a boundary deformation theorem.
result Ricci-positive metrics are constructed on the connected sum of products of arbitrarily many spheres.