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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.

168,742 papers · 148 categories

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35810 · Jun 202619922001200920172026
48 results for timelike loxodromes

The paper studies timelike loxodromes on specific Lorentzian helicoidal surfaces.

problem Analyzing timelike loxodromes on Lorentzian helicoidal surfaces.
method First-order differential equations, general solutions, explicit parametrizations.
result Explicit parametrizations of timelike loxodromes on Lorentzian helicoidal surfaces.

Study spacelike loxodromes on helicoidal surfaces in Lorentzian n-space.

problem Characterize spacelike loxodromes on helicoidal surfaces in Lorentzian n-space.
method Find parametrizations of spacelike loxodromes on both spacelike and timelike helicoidal surfaces.
result Classification of spacelike loxodromes on helicoidal surfaces in Lorentzian n-space.

The study characterizes loxodromes on specific rotational surfaces in 3D space.

problem Characterizing loxodromes on rotational surfaces with special geometric properties.
method Parametrizations and curvature/torsion calculations for loxodromes on various rotational surfaces.
result The loxodrome on a flat rotational surface is a general helix.

In this paper, we prove important results concerning the loxodromes on an invariant surface in a three-dimensional Riemannian manifold, some of which generalize classical results about loxodromes on rotational surfaces in R3\mathbb{R}^3. In particular, we show how to parametrize a loxodrome on an invariant surface of $…

2018-05-06abs ↗pdf ↗

The paper studies loxodromes on twisted surfaces in a specific 3D space.

problem Analyzing loxodromes on twisted surfaces in Lorentz-Minkowski 3-space.
method Developed general formulas and differential equations for different types of loxodromes, meridians, and surfaces in E^3_1.
result Generalized differential equations for loxodromes on Type-I, Type-II, and Type-III twisted surfaces.

Study loxodromes and geodesics on rotational surfaces in pseudo-isotropic space.

problem No study on loxodromes in pseudo-isotropic space I_p^3.
method Define pseudo-isotropic angles, derive equations for space-like and time-like loxodromes and geodesics on rotational surfaces.
result Equations for space-like and time-like loxodromes and geodesics on rotational surfaces in pseudo-isotropic space.

The class of acylindrically hyperbolic groups, which are groups that admit a certain type of non-elementary action on a hyperbolic space, contains many interesting groups such as non-exceptional mapping class groups and Out(Fn)\operatorname{Out}(\mathbb F_n) for n2n\geq 2. In such a group, a generalized loxodromic element i…

2015-05-12abs ↗pdf ↗

Let HCn{\bf H}_{\mathbb C}^n be the nn-dimensional complex hyperbolic space and SU(n,1){\rm SU}(n,1) be the (holomorphic) isometry group. An element gg in SU(n,1){\rm SU}(n,1) is called loxodromic or hyperbolic if it has exactly two fixed points on the boundary HCn\partial {\bf H}_{\mathbb C}^n. We classify SU(n,1){\rm SU}(n,1) conju…

2017-05-30abs ↗pdf ↗

The study examines groups acting loxodromically on hyperbolic graph products.

problem Understanding groups acting loxodromically on hyperbolic graph products.
method Examined groups acting on finite products of hyperbolic graphs, focusing on loxodromic elements.
result Strong structure theorems for groups in this subclass, excluding mapping class groups of genus at least 3 and certain automorphism groups.

Artin-Tits groups act on a certain delta-hyperbolic complex, called the "additional length complex". For an element of the group, acting loxodromically on this complex is a property analogous to the property of being pseudo-Anosov for elements of mapping class groups. By analogy with a well-known conjecture about mappi…

2017-06-26abs ↗pdf ↗

In this paper we prove that a fully irreducible outer automorphism relative to a non-exceptional free factor system acts loxodromically on the relative free factor complex as defined by Handel and Mosher. We also prove a north-south dynamic result for the action of such outer automorphisms on the closure of relative ou…

2016-12-13abs ↗pdf ↗

We construct an example of an isometric action of F(a,b)F(a,b) on a δδ-hyperbolic graph YY, such that this action is acylindrical, purely loxodromic, has asymptotic translation lengths of nontrivial elements of F(a,b)F(a,b) separated away from 00, has quasiconvex orbits in YY, but such that the orbit map F(a,b)YF(a,b)\to Y is n…

2015-04-20abs ↗pdf ↗

The paper counts conjugacy classes of loxodromic elements in Anosov subgroups with a power saving error term.

problem Counting conjugacy classes of loxodromic elements in Anosov subgroups.
method Interpreting Jordan projections as periods of a flow and proving exponential mixing.
result Proves a counting theorem with a power saving error term for conjugacy classes of loxodromic elements.

New infinite-type loxodromic elements found in surface mapping classes.

problem Identifying infinite-type loxodromic elements in mapping classes of surfaces.
method Constructing infinite families of mapping classes acting loxodromically on the relative arc graph.
result Explicit construction and characterization of infinite-type loxodromic elements.

The paper proves inequalities for isometries in loxodromic Kleinian groups.

problem Discreteness criteria for subgroups of PSL2(C)_2(\mathbb{C}).
method Generalization of discreteness criteria, using trace inequalities and optimization problems.
result Inequalities involving traces and hyperbolic displacements for loxodromic Kleinian groups.

Let GXG \curvearrowright X be a nonelementary action by isometries of a hyperbolic group GG on a hyperbolic metric space XX. We show that the set of elements of GG which act as loxodromic isometries of XX is generic. That is, for any finite generating set of GG, the proportion of XX--loxodromics in the ball of ra…

2016-05-06abs ↗pdf ↗

Study on complex hyperbolic bidisk isometries and their Dirichlet domains.

problem Investigating isometries and Dirichlet domains in the complex hyperbolic bidisk.
method Examined the isometries of the complex hyperbolic bidisk and the Dirichlet domain formed by a cyclic subgroup action.
result Proved that the Dirichlet domain has two sides.

Study of timelike surfaces in Minkowski space with specific geometric properties.

problem Characterizing geometric properties of timelike surfaces in Minkowski space.
method Analytical study of two types of timelike general rotational surfaces.
result Explicit descriptions of minimal and surfaces with specific curvature properties.

Let ξξ and ηη be two non--commuting isometries of the hyperbolic 33--space H3\mathbb{H}^3 so that Γ=ξ,ηΓ=\langleξ,η\rangle is a purely loxodromic free Kleinian group. For γΓγ\inΓ and zH3z\in\mathbb{H}^3, let dγzd_γz denote the distance between zz and γzγ\cdot z. Let z1z_1 and z2z_2 be the mid-points of the shortest geod…

2016-04-10abs ↗pdf ↗

In this paper, using the classifications of timelike and spacelike ruled surfaces, we study the Mannheim offsets of timelike ruled surfaces in Minkowski 3-space. Firstly, we define the Mannheim offsets of a timelike ruled surface by considering the Lorentzian casual character of the offset surface. We obtain that the M…

2009-06-11abs ↗pdf ↗

We prove that finitely generated purely loxodromic subgroups of a right-angled Artin group A(Γ)A(Γ) fulfill equivalent conditions that parallel characterizations of convex cocompactness in mapping class groups Mod(S)\text{Mod}(S). In particular, such subgroups are quasiconvex in A(Γ)A(Γ). In addition, we identify a milder cond…

2014-12-11abs ↗pdf ↗

Paper classifies timelike Bonnet surfaces in Lorentzian 3-manifolds.

problem Classifying timelike Bonnet surfaces in Lorentzian 3-manifolds.
method Provided a necessary and sufficient condition for timelike Bonnet surfaces in Lorentzian 3-spaces.
result Theorem classifying timelike Bonnet surfaces in a Lorentzian 3-space.

The study proves timelike Ricci bounds for low regularity spacetimes using optimal transport.

problem Proving timelike Ricci bounds for spacetimes with low regularity.
method Using optimal transport to prove timelike measure-contraction property.
result Timelike curvature-dimension condition holds for C1,1\smash{\mathrm{C}^{1,1}} metrics.

Timelike curvature and Brunn-Minkowski inequality linked in non-smooth spacetimes.

problem Equivalence between timelike Ricci curvature and Brunn-Minkowski inequality in synthetic Lorentzian spaces.
method Introducing strong qq-timelike Brunn-Minkowski condition and proving equivalence to curvature conditions.
result Timelike curvature dimension condition equivalent to timelike Brunn-Minkowski inequality in specific settings.

This study examines geometric properties and offsets of slant timelike-ruled surfaces.

problem Geometric properties and offsets of slant timelike-ruled surfaces in Minkowski 3-space.
method Derivation of parametric formulation, conditions for coaxial alignment, examination through Blaschke and Darboux frames.
result Conditions ensuring the coaxial alignment of the central normal with the ruling direction of the offset surface.

We introduce a new approach to the study of timelike minimal surfaces in the Lorentz-Minkowski space through a split-complex representation formula for this kind of surface. As applications, we solve the Björling problem for timelike surfaces and obtain interesting examples and related results. Using the Björling repre…

2009-06-12abs ↗pdf ↗

Study timelike meridian surfaces in Minkowski 4-space with specific properties.

problem Characterize timelike meridian surfaces with special properties in Minkowski 4-space.
method Analyze different classes of timelike meridian surfaces with constant Gauss curvature, mean curvature, and parallel normalized mean curvature vector field.
result Explicit solutions to PDEs describing timelike surfaces with parallel normalized mean curvature vector field.

Study timelike minimal surfaces in Heisenberg group using harmonic maps.

problem Characterize timelike minimal surfaces in the Heisenberg group.
method Characterization through non-conformal Lorentz harmonic maps and generalized Weierstrass type representation.
result Established generalized Weierstrass type representation for timelike minimal surfaces.