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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.

168,694 papers · 148 categories

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48 results for Scherk ends

Researchers create minimal surfaces with Scherk ends and find catenoid limits.

problem Constructing minimal surfaces with specific end types and understanding their limits.
method Constructing families of embedded, singly periodic minimal surfaces with Scherk-type ends and analyzing their limits.
result The limit of the constructed surfaces are catenoid necks connecting planes, determined by Stieltjes polynomials.

In 1988, Karcher generalized the family of singly periodic Scherk minimal surfaces by constructing, for each natural n2n\geq 2, a (2n3)(2n-3)-parameter family of singly periodic minimal surfaces with genus zero and 2n2n Scherk-type ends in the quotient, called {\it saddle towers}. They have been recently classified by Pér…

2006-11-21abs ↗pdf ↗

New method glues Scherk surfaces into minimal surfaces, limiting possible outcomes.

problem Limiting the outcomes of gluing Scherk surfaces into minimal surfaces.
method Constructing minimal surfaces by stacking and gluing doubly periodic Scherk surfaces.
result Except for special cases, gluing more Scherk surfaces results in known minimal surfaces.

We construct Weierstrass data for higher genus embedded doubly periodic minimal surfaces and present numerical evidence that the associated period problem can be solved. In the orthogonal ends case, there previously was only one known surface for each genus. We illustrate multiple new examples for each genus g>2. In th…

2016-02-17abs ↗pdf ↗

We prove the existence of a family of embedded doubly periodic minimal surfaces of (quotient) genus gg with orthogonal ends that generalizes the classical doubly periodic surface of Scherk and the genus-one Scherk surface of Karcher. The proof of the family of immersed surfaces is by induction on genus, while the proo…

2010-07-30abs ↗pdf ↗

We give a positive answer to M. Traizet's open question about the existence of complete embedded minimal surfaces with Scherk-ends without planar geodesics. In the singly periodic case, these examples get close to an extension of Traizet's result concerning asymmetric complete minimal submanifolds of Euclidean space wi…

2004-08-30abs ↗pdf ↗

We consider the question of existence of embedded doubly periodic minimal surfaces in Euclidean 3-space with Scherk-type ends, surfaces that topologically are Scherk's doubly periodic surface with handles added in various ways. We extend the existence results of H. Karcher and F. Wei to more cases, and we find other ca…

2009-12-25abs ↗pdf ↗

The paper shows how Scherk-type surfaces can be decomposed into helicoids.

problem Decomposing Scherk-type zero mean curvature surfaces.
method Using a special Euler-Ramanujan identity and Wick rotation, the paper expresses these surfaces as an infinite superposition of dilated helicoids and provides different finite decompositions.
result Scherk-type zero mean curvature surfaces can be expressed as an infinite superposition of dilated helicoids.

In 3-dimensional Euclidean space, Scherk second surfaces are singly periodic embedded minimal surfaces with four planar ends. In this paper, we obtain a natural generalization of these minimal surfaces in any higher dimensional Euclidean space Rn+1{\R}^{n+1}, for n3n \geq 3. More precisely, we show that there exist $(n-1…

2001-09-19abs ↗pdf ↗

Using Traizet's regeneration method, we prove that for each positive integer n there is a family of embedded, doubly periodic minimal surfaces with parallel ends in Euclidean space of genus 2n-1 and 4 ends in the quotient by the maximal group of translations. The genus 2n-1 family converges smoothly to 2n copies of Sch…

2016-04-21abs ↗pdf ↗

In 1996 M. Traizet obtained singly periodic minimal surfaces with Scherk ends of arbitrary genus by desingularizing a set of vertical planes at their intersections. However, in Traizet's work it is not allowed that three or more planes intersect at the same line. In our paper, by a {\it saddle-tower} we call the desing…

2009-06-08abs ↗pdf ↗

The paper classifies affine minimal translation surfaces and finds their properties.

problem Classifying and understanding affine minimal translation surfaces.
method Using Weierstrass-Enneper formula and hodographic coordinate system.
result Classification and properties of affine minimal translation surfaces.

Let K\mathcal{K} be the space of properly embedded minimal tori in quotients of R3\R^3 by two independent translations, with any fixed (even) number of parallel ends. After an appropriate normalization, we prove that K\mathcal{K} is a 3-dimensional real analytic manifold that reduces to the finite coverings of the ex…

2005-01-28abs ↗pdf ↗

Given k>=2, we construct a (2k-2)-parameter family of properly embedded minimal surfaces in H^2 x R invariant by a vertical translation T, called Saddle Towers, which have total intrinsic curvature 4 pi(1-k), genus zero and 2k vertical Scherk-type ends in the quotient by T. As limits of those Saddle Towers, we obtain J…

2009-10-29abs ↗pdf ↗

Inspired by the Finn-Osserman (1964), Chern (1969), do Carmo-Peng (1979) proofs of the Bernstein theorem, which characterizes flat planes as the only entire minimal graphs, we prove a new rigidity theorem for associate families connecting the doubly periodic Scherk graphs and the singly periodic Scherk towers. Our char…

2018-12-04abs ↗pdf ↗

We describe the family of minimal graphs on strips with boundary values ±\pm\infty disposed alternately on edges of length one, and whose conjugate graphs are contained in horizontal slabs of width one in R3\mathbb{R}^3. We can obtain as limits of such graphs the helicoid, all the doubly periodic Scherk minimal surfac…

2006-11-23abs ↗pdf ↗

Constructs minimal surfaces over Pitot quadrilaterals using harmonic diffeomorphisms.

problem Construct minimal surfaces over Pitot quadrilaterals.
method Develops a fully explicit framework using harmonic diffeomorphisms and Weierstrass data.
result Constructs a unique minimal surface \(Σ^\diamond\) that maximizes Gaussian curvature.

We study the Dirichlet problem for the following prescribed mean curvature PDE {divv1+v2=f(x,v) in Ωv=φ on Ω. \begin{cases} -\operatorname{div}\dfrac{\nabla v}{\sqrt{1+|\nabla v|^{2}}}=f(x,v) \text{ in }Ω\\ v=\varphi \text{ on }\partialΩ. \end{cases} where ΩΩ is a domain contained in a complete Riemannian manifold M,M, $f:Ω\times\mathbb{R\rig…

2018-11-24abs ↗pdf ↗

We prove a half-space theorem for an ideal Scherk graph ΣM×RΣ\subset M\times\mathbb R over a polygonal domain DM,D\subset M, where MM is a Hadamard surface whose curvature is bounded above by a negative constant. More precisely, we show that a properly immersed minimal surface contained in D×RD\times\mathbb R and disjoint…

2013-06-26abs ↗pdf ↗

We prove existence and uniqueness for a two-parameter family of translators for mean curvature flow. We get additional examples by taking limits at the boundary of the parameter space. Some of the translators resemble well-known minimal surfaces (Scherk's doubly periodic minimal surfaces, helicoids), but others have no…

2019-03-11abs ↗pdf ↗

It is known that a complete immersed minimal surface with finite total curvature in H2×R\mathbb H^2\times\mathbb R is proper, has finite topology and each one of its ends is asymptotic to a geodesic polygon at infinity (Hauswirth and Rosenberg, 2006; Hauswirth, Nelli, Sa Earp and Toubiana, 2015). In this paper we prove t…

2016-04-24abs ↗pdf ↗

Let (M, g, k) be an initial data set for the Einstein equations of general relativity. We prove that there exist solutions of the Plateau problem for marginally outer trapped surfaces (MOTSs) that are stable in the sense of MOTSs. This answers a question of G. Galloway and N. O'Murchadha and is an ingredient in the pro…

2012-05-19abs ↗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.

The paper classifies maximal translation surfaces in Lorentz-Minkowski space.

problem Classifying maximal translation surfaces in Lorentz-Minkowski space.
method Analyzing surfaces defined as the sum of two spatial curves, proving properties of generating curves, and classifying surfaces based on curve types.
result A full description of maximal translation surfaces, including new examples not found in Euclidean space.

We show that generalised geometry gives a unified description of maximally supersymmetric consistent truncations of ten- and eleven-dimensional supergravity. In all cases the reduction manifold admits a "generalised parallelisation" with a frame algebra with constant coefficients. The consistent truncation then arises …

2014-01-14abs ↗pdf ↗

New minimal 2-spheres found in hyperkähler 4-manifolds, unstable and not holomorphic.

problem Characterizing stable minimal surfaces in hyperkähler 4-manifolds.
method Gluing construction using Scherk and Taub-NUT surfaces, harmonic map parametrization.
result Existence of unstable minimal 2-spheres with degree-1 Gauss lift, not holomorphic.

In this paper we prove existence of complete minimal surfaces in some metric semidirect products. These surfaces are similar to the doubly and singly periodic Scherk minimal surfaces in R3\mathbb R^3. In particular, we obtain these surfaces in the Heisenberg space with its canonical metric, and in Sol3 with a one-param…

2013-09-10abs ↗pdf ↗

The presentation of supergravity theories of our previous paper "Super-Poincare' algebras, space-times and supergravities (I)" is re-formulated in the language of Berezin-Leites-Kostant theory of supermanifolds. It is also shown that the equations of Cremmer, Julia and Scherk's theory of 11D-supergravity are equivalent…

2011-08-31abs ↗pdf ↗

Researchers create new triply periodic minimal surfaces by gluing saddle towers.

problem Creating triply periodic minimal surfaces without symmetry constraints.
method Gluing Karcher-Scherk saddle towers with phase differences and balancing under vertical interaction.
result Expands known triply periodic minimal surfaces into new 5-parameter families.

Large twist-angle grain boundaries in layered structures are often described by Scherk's first surface whereas small twist-angle grain boundaries are usually described in terms of an array of screw dislocations. We show that there is no essential distinction between these two descriptions and that, in particular, their…

1998-08-27abs ↗pdf ↗