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Harmonic mappings have long intrigued researchers due to their intrinsic connection with minimal surfaces. In this paper, we investigate shearing of two distinct classes of univalent conformal mappings which are convex in horizontal…

Complex Variables · Mathematics 2023-10-17 Simran Bedi , Sanjay Kumar

Let S be a C^2 H-minimal noncharacteristic hypersurface in the first Heisenberg group. We show that if S contains a graphical strip, then it is not a stable minimal surface. Moreover, we show that if S is a C^2 H-minimal noncharacteristic…

Differential Geometry · Mathematics 2007-05-23 D. Danielli , N. Garofalo , D. M. Nhieu , S. D. Pauls

We study the structure of generalized Baumslag-Solitar groups from the point of view of their (usually non-unique) splittings as fundamental groups of graphs of infinite cyclic groups. We find and characterize certain decompositions of…

Group Theory · Mathematics 2016-09-13 Max Forester

We consider the subspace of the homology of a covering space spanned by lifts of simple closed curves. Our main result is the existence of unbranched covers of surfaces where this is a proper subspace. More generally, for a fixed finite…

Geometric Topology · Mathematics 2025-05-05 Adam Klukowski

For an embedded singly periodic minimal surface M with genus bigger than or equal to 4 and annular ends, some weak symmetry hypotheses imply its congruence with one of the Hoffman-Wohlgemuth examples. We give a very geometrical proof of…

Differential Geometry · Mathematics 2008-06-12 Valerio Ramos-Batista , Plinio Simoes

We study symmetric minimal surfaces in the three-dimensional Heisenberg group $\mathrm{Nil}_3$ using the generalized Weierstrass type representation, the so-called loop group method. In particular, we will discuss how to construct minimal…

Differential Geometry · Mathematics 2022-11-08 Josef F. Dorfmeister , Jun-ichi Inoguchi , Shimpei Kobayashi

We construct new examples of immersed minimal surfaces with catenoid ends and finite total curvature, of both genus zero and higher genus. In the genus zero case, we classify all such surfaces with at most $2n+1$ ends, and with symmetry…

Differential Geometry · Mathematics 2008-04-29 Wayne Rossman

In this paper we study some geometric properties of surfaces in the Heisenberg group, $\mathcal{H}_{3}.$ We obtain, using the Gauss map for Lie groups, a partial classification of minimal graphs in $\mathcal{H}_{3}.$ We also proof the non…

Differential Geometry · Mathematics 2011-06-15 Christiam Figueroa

In the work \cite{Laredo} the author shows that every hypersurface in Euclidean space is locally associated to the unit sphere by a sphere congruence, whose radius function $R$ is a geometric invariant of hypersurface. In this paper we…

Differential Geometry · Mathematics 2022-09-30 Laredo Rennan Pereira Santos , Armando Mauro Vasquez Corro

Given a compact Riemann surface $\Sigma$ of genus $g_\Sigma\, \geq\, 2$, and an effective divisor $D\, =\, \sum_i n_i x_i$ on $\Sigma$ with $\text{degree}(D)\, <\, 2(g_\Sigma -1)$, there is a unique cone metric on $\Sigma$ of constant…

Differential Geometry · Mathematics 2022-03-03 Indranil Biswas , Steven Bradlow , Sorin Dumitrescu , Sebastian Heller

This paper explores connections between Heegaard genus, minimal surfaces, and pseudo-Anosov monodromies. Fixing a pseudo-Anosov map phi and an integer n, let M_n be the 3-manifold fibered over S^1 with monodromy phi^n. JH Rubinstein showed…

Geometric Topology · Mathematics 2009-03-30 Mark Brittenham , Yo'av Rieck

We consider surfaces of class $C^1$ in the $3$-dimensional sub-Riemannian Heisenberg group ${\mathbb H}^1$. Assuming the surface is area-stationary, i.e., a critical point of the sub-Riemannian perimeter under compactly supported…

Differential Geometry · Mathematics 2015-08-21 Matteo Galli , Manuel Ritoré

We construct compact arbitrary Euler characteristic orientable and non-orientable minimal surfaces in the Berger spheres. Besides we show an interesting family of surfaces that are minimal in every Berger sphere, characterizing them by this…

Differential Geometry · Mathematics 2010-07-08 Francisco Torralbo

This paper is an addendum to [4], in which the authors constructed a simply connected minimal complex surface of general type with p_g=0 and K^2=3. In this paper we construct a new non-simply connected minimal surface of general type with…

Algebraic Geometry · Mathematics 2008-03-26 Heesang Park , Jongil Park , Dongsoo Shin

In the present paper we consider generic Sub-Riemannian structures on the co-rank 1 non-holonomic vector distributions and introduce the associated canonical volume and ''horizontal'' area forms. As in the classical case, the Sub-Riemannian…

Differential Geometry · Mathematics 2007-05-23 Nataliya Shcherbakova

The surface Houghton groups $\mathcal{H}_{n}$ are a family of groups generalizing Houghton groups $H_n$, which are constructed as asymptotically rigid mapping class groups. We give a complete computation of the BNSR-invariants…

Geometric Topology · Mathematics 2025-11-26 Noah Torgerson , Jeremy West

We construct a new family of simply connected minimal complex surfaces with $p_g=1$, $q=0$, and $K^2=8$ using a $\mathbb{Q}$-Gorenstein smoothing theory.

Algebraic Geometry · Mathematics 2009-10-20 Heesang Park , Jongil Park , Dongsoo Shin

The problem of finding all minimal surfaces presented in parametric form as polynomials of certain degree is discussed by many authors. It is known that the classical Enneper surface is (up to position in space and homothety) the only…

Differential Geometry · Mathematics 2016-06-01 Ognian Kassabov

Let $p$ be a branched covering of a Riemann surface to the Riemann sphere $\mathbb{P}^1$, with branching set $B \subset \mathbb{P}^1$. We define the complexity of $p$ as infinity, if $\mathbb{P}^1 \setminus B$ does not admit a hyperbolic…

Geometric Topology · Mathematics 2015-04-17 Aldo-Hilario Cruz-Cota

Regular semisimple Hessenberg varieties are a family of subvarieties of the flag variety that arise in number theory, numerical analysis, representation theory, algebraic geometry, and combinatorics. We give a "Giambelli formula" expressing…

Algebraic Geometry · Mathematics 2011-08-31 Dave Anderson , Julianna Tymoczko