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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.

168,694 papers · 148 categories

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14274154 · May 202619922001200920172026
48 results for geodesic height

We classify, in terms of topology of highest arcs, low height non-simple geodesics on the modular hyperbolic punctured sphere with three elliptic fixed points of order two. Of eight possible types, exactly one consists of geodesics that form a bigon about the cusp; we express all such geodesics in terms of Markoff trip…

2004-10-07abs ↗pdf ↗

Marden and Strebel established the Heights Theorem for integrable holomorphic quadratic differentials on parabolic Riemann surfaces. We extends the validity of the Heights Theorem to all surfaces whose fundamental group is of the first kind. In fact, we establish a more general result: the {\it horizontal} map which as…

2019-12-26abs ↗pdf ↗

Study the relative volume function on AH manifolds and its applications.

problem Characterize the height of geodesic defining functions and capacity of balls.
method Define and analyze the relative volume function, proving its boundedness and regularity.
result Uniformly bounded relative volume function at infinity, bound dependent only on dimension.

We will discuss some sharp estimates for CMC graphs in a Riemannian 3-manifold MxR whose boundary is contained in a slice. We will start by giving sharp lower bounds for the geodesic curvature of the boundary and improve these bounds when assuming additional restrictions on the maximum height that such a surface reache…

2010-06-29abs ↗pdf ↗

Given a family of (almost) disjoint strictly convex subsets of a complete negatively curved Riemannian manifold M, such as balls, horoballs, tubular neighborhoods of totally geodesic submanifolds, etc, the aim of this paper is to construct geodesic rays or lines in M which have exactly once an exactly prescribed (big e…

2007-06-18abs ↗pdf ↗

We obtain area growth estimates for constant mean curvature graphs in E(κ,τ)\mathbb{E}(κ,τ)-spaces with κ0κ\leq 0, by finding sharp upper bounds for the volume of geodesic balls in E(κ,τ)\mathbb{E}(κ,τ). We focus on complete graphs and graphs with zero boundary values. For instance, we prove that entire graphs in $\mathbb{E}(κ…

2015-04-20abs ↗pdf ↗

We prove rigidity for hypersurfaces with boundary in the unit (n+1)(n+1)-sphere with scalar curvature bounded below by n(n1)n(n-1). Under appropriate boundary conditions, the hypersurfaces are shown to be part of the equatorial spheres. The lower bound n(n1)n(n-1) is critical in the sense that the hypersurface may contain geode…

2011-04-03abs ↗pdf ↗

Let M be a complete simply connected Riemannian manifold, with sectional curvature K bounded above by -1. Under some assumptions on the geometry of the boundary of M, which are satisfied for instance if M is a symmetric space, or has dimension 2, we prove that given any family of horoballs in M, and any point x_0 outsi…

2004-02-05abs ↗pdf ↗

The abstract discusses connections between K-stability, heights, and rational points on Fano varieties.

problem Understanding the density of rational points on Fano varieties.
method Exploring connections between height bounds, K-stability, and Peyre's conjecture.
result Established an analog of height inequalities for real points, related to Kähler-Einstein metrics.

We construct genomic predictors for heritable and extremely complex human quantitative traits (height, heel bone density, and educational attainment) using modern methods in high dimensional statistics (i.e., machine learning). Replication tests show that these predictors capture, respectively, \sim40, 20, and 9 perc…

2017-09-19abs ↗pdf ↗

In the following text we prove that for all finite p0p\geq0 there exists a topological graph XX such that {p,p+1,p+2,}{+}\{p,p+1,p+2,\ldots\}\cup\{+\infty\} is the collection of all possible heights for transformation groups with phase space XX. Moreover for all topological graph XX with pp as height of transformation group $(H…

2017-10-30abs ↗pdf ↗

In this paper, we investigate three geometrical invariants of knots, the height, the trunk and the representativity. First, we give a conterexample for the conjecture which states that the height is additive under connected sum of knots. We also define the minimal height of a knot and give a potential example which has…

2017-09-21abs ↗pdf ↗

The study examines gradient almost Yamabe solitons in warped product manifolds and their geometric properties.

problem Investigating the geometry of gradient almost Yamabe solitons in warped product manifolds.
method Presenting geometric rigidity results, investigating existence conditions, and classifying specific solitons.
result Classification of rotational gradient almost Yamabe solitons in RimesfRn\mathbb{R} imes_{f}\mathbb{R}^{n}.

The stabilisation height of a fibre surface in the 3-sphere is the minimal number of Hopf plumbing operations needed to attain a stable fibre surface from the initial surface. We show that families of fibre surfaces related by iterated Stallings twists have unbounded stabilisation height.

2016-07-04abs ↗pdf ↗

We study the singularities of the members of the family of height functions on Whitney umbrellas, which is also known as cross-caps, and show that the family of the height functions is a versal unfolding. Moreover, we study local intersections of a Whitney umbrella with a hyperplane through its singular point.

2012-05-14abs ↗pdf ↗

Defines height pairing for differential forms on Riemann surface degenerations.

problem Calculating heights for differential forms on degenerating Riemann surfaces.
method Defines Archimedean height pairing, uses Dai-Yoshikawa asymptotics, extends Filip-Tosatti construction.
result Relates new pairing to current-valued pairing, extends geometric settings.

Study uses satellite and lidar data to map forest height and biomass in France.

problem Mapping forest resources and carbon in large areas.
method Machine learning approach using Sentinel-1, Sentinel-2, ALOS-2, and GEDI Lidar data.
result High-resolution maps of forest height and biomass produced with good accuracy.

Study describes singularities of height functions on specific singular surfaces.

problem Analyzing singularities of height functions on singular surfaces.
method Using geometric language and blowing-ups, investigate singularities of height functions and dual surfaces.
result Characterized singularities of height functions and dual surfaces on specific singular surfaces.

The paper modifies a warped product space to find conditions for constant height functions.

problem Finding sufficient conditions for the height function to be constant in a modified warped product space.
method The paper modifies the warped product space by adding a warping function and discusses the sufficient condition for the height of immersed surfaces.
result The paper establishes a sufficient condition for the height function to be constant in the modified warped product space.

We describe spaces of essential finite height (measured) laminations in a surface SS using a parameter space we call S\mathbb S, an ordered semi-ring. We show that for every finite height essential lamination LL in SS, there is an action of π1(S)π_1(S) on an S\mathbb S-tree dual to the lift of LL to the universal co…

2014-04-11abs ↗pdf ↗

We explain how the Transference Principles from Diophantine approximation can be interpreted in terms of geometry of the locally symmetric spaces Tn=SO(n)\SL(n,R)/SL(n,Z)T_n=SO(n) \backslash SL(n,R) /SL(n,Z) with n>1n>1, and how, via this dictionary, they become transparent geometric remarks and can be easily proved. Indeed, a finite family …

2008-11-02abs ↗pdf ↗

This paper exhibits equivalences of 2-stacks between certain models of S1\mathbb{S}^1-gerbes and differential 3-cocycles. We focus primarily on the model of Dixmier-Douady bundles, and provide an equivalence between the 2-stack of Dixmier-Douady bundles and the 2-stack of differential 3-cocycles of height 1, where the …

2017-05-02abs ↗pdf ↗

We consider height functions on symmetric spaces MG/KM\cong G/K embedded in the associated matrix Lie group GG. In particular we study the relationship between the critical sets of the height function on GG and its restriction to MM. Also we prove that the gradient flow on MM can be integrated by means of a generaliz…

2013-07-23abs ↗pdf ↗

The height function of various surfaces decomposes into finite sums of scaled and translated versions of itself.

problem Decomposing the height function of different types of surfaces into simpler components.
method Using Euler-Ramanujan identities and Weierstrass-Enneper representation to decompose height functions of minimal, maximal, timelike minimal, and Born-Infeld surfaces.
result The height function of various surfaces can be expressed as a finite sum of scaled and translated versions of itself.

Sharp bounds on K-semistable Fano varieties for low dimensions.

problem Establishing bounds on the height of K-semistable Fano varieties.
method Analyzing canonical integral models of toric Fano varieties, using the gap hypothesis and Donaldson's modular height.
result Sharp lower bounds on the height of toric Fano varieties, with applications to Mabuchi functional and Odaka's modular height.

This paper addresses a long standing open problem due to Lehmer in which the triple 2,3,7 plays a notable role. Lehmer's problem asks whether there is a gap between 1 and the next smallest algebraic integer with respect to Mahler measure. The question has been studied in a wide range of contexts including number theory…

2002-04-02abs ↗pdf ↗

DeepMIDE forecasts wind speeds across space, time, and height for offshore wind energy.

problem Forecasting wind speeds across multiple heights for large offshore wind turbines.
method Statistical deep learning model that jointly models wind speeds at different heights using a multi-output integro-difference equation.
result DeepMIDE forecasts outperform traditional methods in real-world offshore wind energy data.

The paper derives height estimates for surfaces with constant curvature in warped product spaces.

problem Estimating heights of surfaces with constant curvature in warped product spaces.
method Use of conformal parameters and geometric applications to derive height estimates.
result Derives height estimates for surfaces with positive extrinsic or mean curvature in RimesfR2\mathbb{R} imes_{f} \mathbb{R}^{2}.

Given a finite graph of relatively hyperbolic groups with its fundamental group relatively hyperbolic and edge groups quasi-isometrically embedded and relatively quasiconvex in vertex groups, we prove that vertex groups are relatively quasiconvex if and only if all the vertex groups have finite relative height in the f…

2015-08-21abs ↗pdf ↗