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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.

168,657 papers · 148 categories

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81161242322 · May 202619922001200920172026
48 results for locally stable

Stable planes are locally isomorphic to classical projective planes.

problem Characterizing stable planes that are locally isomorphic to classical projective planes.
method Analyzing properties of stable planes and comparing them to classical projective planes over specific fields.
result Simply connected stable planes with connected lines are isomorphic to open subplanes of classical projective planes.

We consider the notion of stable isomorphism of bundle gerbes. It has the consequence that the stable isomorphism classes of bundle gerbes over a manifold M are in bijective correspondence with H^3(M, Z). Stable isomorphism sheds light on the local theory of bundle gerbes and enables us to develop a classifying theory …

1999-08-26abs ↗pdf ↗

Locally stable maps S3R4S^3\to\mathbb{R}^4 are classified up to homotopy through locally stable maps. The equivalence class of a map ff is determined by three invariants: the isotopy class σ(f)σ(f) of its framed singularity link, the generalized normal degree ν(f)ν(f), and the algebraic number of cusps κ(f)κ(f) of any extensi…

2013-12-13abs ↗pdf ↗

The paper explores stable surfaces in Einstein-Maxwell theory, proving mass bounds and nonexistence results.

problem Exploring stable surfaces in static Einstein-Maxwell space-time.
method Using mean-stable surfaces theory to prove properties of lapse functions and mass bounds.
result Proves ADM mass is bounded by Hawking quasi-local mass.

The paper introduces a new method to create stable ergodic actions on higher-dimensional manifolds.

problem Stable ergodicity of group actions on smooth manifolds restricted to one-dimensional cases.
method Geometric method using quasi-conformal blender for constructing stable local dynamics.
result Every closed manifold admits stably ergodic finitely generated group actions by diffeomorphisms of class C1+αC^{1+α}.

We prove that any limit-interface corresponding to a locally uniformly bounded, locally energy-bounded sequence of stable critical points of the van der Waals--Cahn--Hilliard energy functionals with perturbation parameter tending to 0 is supported by an embedded smooth stable minimal hypersurface in low dimensions and …

2010-07-13abs ↗pdf ↗

Study virtual fundamental classes of derived manifolds, proving invariant vanishes.

problem Computing virtual fundamental classes for derived manifolds.
method Combining derived differential geometry and cosection localization.
result Stable pair invariants of hyperkähler fourfolds are zero.

Local minimality proven for stable free-boundary minimal hypersurfaces.

problem Proving local minimality for stable free-boundary minimal hypersurfaces.
method Using relative current setting and strict stability, proving local minimality among relative cycles.
result Local minimality of stable free-boundary minimal hypersurfaces in a small tubular neighborhood.

The paper proves volume comparison theorems for metrics near stable Einstein and Ricci flat manifolds.

problem Investigating volume comparison theorems for metrics near stable Einstein and Ricci flat manifolds.
method Applying similar techniques to derive local rigidity theorems for strictly stable Ricci flat manifolds.
result Derives local rigidity theorems for strictly stable Ricci flat manifolds with respect to σ2-curvature.

The paper establishes a correspondence between Higgs torsors and connections on curves.

problem Establishing a correspondence between Higgs torsors and connections on curves.
method Introduced a stability condition on filtered Stokes local systems and used it to prove a one-to-one correspondence.
result One-to-one correspondence between stable meromorphic parahoric Higgs torsors and stable meromorphic parahoric connections.

The paper studies deformations of singular minimal hypersurfaces in dimensions 7 and above.

problem The behavior of singular minimal hypersurfaces in dimensions 7 and above.
method Analyzes the local behavior of minimal hypersurfaces under perturbations and convergence of families of hypersurfaces.
result Existence and smoothness of nearby minimal hypersurfaces under perturbations, uniqueness of homological minimization, and existence of Jacobi fields.

Study proves area estimates for stable capillary hypersurfaces with nonpositive Yamabe invariant.

problem Estimating areas of stable capillary hypersurfaces with nonpositive Yamabe invariant.
method Proves area estimates using stable capillary hypersurfaces in Riemannian manifolds.
result Local rigidity result for embedded, J\mathcal{J}-energy-minimizing hypersurfaces.

In this paper we show how the existence of a certain stable cylinder determines (locally) the ambient manifold where it is immersed. This cylinder has to verify a {\it bifurcation phenomena}, we make this explicit in the introduction. In particular, the existence of such a stable cylinder implies that the ambient manif…

2011-04-16abs ↗pdf ↗

We establish some a priori geometric relations on stable minimal surfaces lying inside three-manifolds with scalar curvature uniformly bounded below. The relations are based on a slight generalization of a formula due to Castillon. We apply it to prove non-local rigidity results in the particular sense that they expres…

2010-02-17abs ↗pdf ↗

We present an approach to Gromov-Witten invariants that works on arbitrary (closed) symplectic manifolds. We avoid genericity arguments and take into account singular curves in the very formulation. The method is by first endowing mapping spaces from (prestable) algebraic curves into the symplectic manifold with the st…

1996-08-12abs ↗pdf ↗

Graph products inherit Morse local-to-global property from their components.

problem Generalizing local-to-global property to graph products of infinite groups.
method Generalizing maximization procedure for relatively hierarchically hyperbolic groups and showing stable embeddings.
result Graph products of infinite Morse local-to-global groups have the Morse local-to-global property.

The gradient flow of the Yang-Mills action acts pointwise on closed loops of gauge fields. We construct a topologically nontrivial loop of SU(2) gauge fields on S4 that is locally stable under the flow. The stable loop is written explicitly as a path between two gauge fields equivalent under a topologically nontrivial …

2010-08-06abs ↗pdf ↗

Curvature estimate for stable free boundary minimal hypersurfaces in wedge-shaped manifolds.

problem Estimating curvature of stable free boundary minimal hypersurfaces in wedge-shaped manifolds.
method Compactness theorem and Schoen-Simon-Yau estimates.
result Curvature estimate for free boundary minimal hypersurfaces in wedge-shaped manifolds.

Study on infinite-type surfaces shows stable commutator length is continuous and defines open subgroups.

problem Understanding stable commutator length on infinite-type surfaces.
method Analyzing mapping class groups of infinite-type surfaces, showing continuity and openness of commutator subgroups.
result Stable commutator length defines a continuous function on commutator subgroups of infinite-type mapping class groups.

In this paper, we derive curvature estimates for strongly stable hypersurfaces with constant mean curvature immersed in Rn+1\mathbb{R}^{n+1}, which show that the locally controlled volume growth yields a globally controlled volume growth if M=\partial M=\emptyset. Moreover, we deduce a Bernstein-type theorem for complete…

2012-12-14abs ↗pdf ↗

Turaev's shadow can be seen locally as the Stein factorization of a stable map. In this paper, we define the notion of stable map complexity for a compact orientable 3-manifold bounded by (possibly empty) tori counting, with some weights, the minimal number of singular fibers of codimension 2 of stable maps into the re…

2014-03-03abs ↗pdf ↗

New method calibrates LV surfaces for exotic derivatives with smoother, more stable Greeks.

problem Challenges in LV calibration leading to spiky surfaces and unstable Greeks.
method Automatic local regression to pre-process market observables and smooth LV surfaces.
result Significantly smoother LV surfaces and greatly improved Greek stability with negligible additional cost.

New definition of stable (r+1)(r+1)-th capillary hypersurfaces proposed.

problem Stability of capillary hypersurfaces in different geometries.
method Defining stable (r+1)(r+1)-th capillary hypersurfaces as smooth local minimizers of a new energy functional under volume-preserving and contact angle-preserving variations.
result Generalization of stability results to (r+1)(r+1)-th capillary hypersurfaces.

We consider the stable ruled surface S1S_1 over an elliptic curve. There is a unique foliation on S1S_1 transverse to the fibration. The minimal self-intersection sections also define a 2-web. We prove that the 4-web defined by the fibration, the foliation and the 2-web is locally parallelizable.

2019-03-01abs ↗pdf ↗

The study examines stable regions in weighted manifolds with boundary properties.

problem Studying stable regions in weighted manifolds with boundary properties.
method Using deformations constructed from parallel vector fields tangent to the boundary, the study deduces rigidity properties for stable sets.
result The classification of stable sets in some Riemannian cylinders and uniqueness results for minimizers.

Groups of importance in group theory have flexible stability properties.

problem Stability and flexibility of groups in geometric and combinatorial group theory.
method Establishing Kirchberg's Local Lifting Property and Lubotzky--Shalom's Property FD for specific groups.
result Groups like 33-manifold groups, limit groups, and certain one-relator groups are very flexibly stable.

Adaptive importance sampling for estimating point process statistics.

problem Estimating the expected value of a statistic of a locally stable point process.
method Adaptive importance sampling with Poisson point processes and cross-entropy minimization.
result The proposed estimator converges to the target value almost surely and is asymptotically normal.

We prove that a strictly stable minimal Ch2C^2_h intrinsic graph G is locally area-minimizing, i.e. given any Ch1C^1_h graph SS with the same boundary, Area(G)<Area(S)\text{Area}(G)<\text{Area}(S) unless G=SG=S. As a consequence we show the existence and the uniqueness of CC^\infty minimal graphs with prescribed small boundary datum…

2017-01-22abs ↗pdf ↗

Geometric Invariant Theory applied to Kähler manifolds yields analytic models for vector bundles.

problem Constructing local models for vector bundles on Kähler manifolds.
method Applying Geometric Invariant Theory to Kähler manifolds to construct analytic GIT-quotients.
result Existence of Weil-Petersson forms on parameter spaces for stable vector bundles.

Gradient descent converges linearly in finite-width networks with positive NTK and compatible conditions.

problem Local convergence of gradient descent in finite-width networks.
method Positive Neural Tangent Kernel (NTK), local Polyak-Łojasiewicz inequality, fixed-step containment in Locally Quasi-Convex Region (LQCR).
result Linear convergence achieved under specific conditions.

For LXL \hookrightarrow X a Lagrangian embedding associated with a real homogeneous space, we construct the moduli space of stable holomorphic discs mapping to (X,L)(X,L) as an orbifold with corners equipped with a group action. Some essential constructions involving orbifolds with corners are also discussed, including th…

2017-09-21abs ↗pdf ↗

The paper studies HYM connections on stable vector bundles over Kähler manifolds.

problem Analyzing stability and convergence of Hermitian Yang-Mills connections.
method Semialgebraic decomposition of the Kähler cone into stability chambers.
result HYM connections converge to a stable HYM connection as polarisation converges.

For a generic embedding of a smooth closed surface MM into R4\mathbb R^4, the subset of R4\mathbb R^4 which is the affine λλ-equidistant of MM appears as the discriminant set of a stable mapping M×MR4M \times M \to \mathbb R^4, hence their stable singularities are Ak,k=2,3,4,A_k, \, k=2, 3, 4, and C2,2±C_{2,2}^{\pm}. In this paper…

2015-06-12abs ↗pdf ↗