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In this paper, we study totally real minimal surfaces in the quaternionic projective space $\mathbb{H}P^n$. We prove that the linearly full totally real flat minimal surfaces of isotropy order $n$ in $\mathbb{H}P^n$ are two surfaces in…

Differential Geometry · Mathematics 2020-12-11 Ling He , Xianchao Zhou

Let M_0^R be the moduli space of smooth real cubic surfaces. We show that each of its components admits a real hyperbolic structure. More precisely, one can remove some lower-dimensional geodesic subspaces from a real hyperbolic space H^4…

Algebraic Geometry · Mathematics 2009-05-11 Daniel Allcock , James A. Carlson , Domingo Toledo

Let $(M,g)$ be an asymptotically flat $3$-manifold containing no closed embedded minimal surfaces. We prove that for every point $p\in M$ there exists a complete properly embedded minimal plane in $M$ containing $p$.

Differential Geometry · Mathematics 2021-12-06 Otis Chodosh , Daniel Ketover

In this paper, we consider new components of the key space of the Moduli space of minimal surfaces in flat 4-tori and calculate their dimensions. Moreover, we construct an example of minimal surfaces in 4-tori and obtain an element of the…

Differential Geometry · Mathematics 2007-05-23 Toshihiro Shoda

In this paper, we study geometry of totally real minimal surfaces in the complex hyperquadric $Q_{N-2}$, and obtain some characterizations of the harmonic sequence generated by these minimal immersions. For totally real flat surfaces that…

Differential Geometry · Mathematics 2020-01-09 Ling He , Xiaoxiang Jiao , Mingyan Li

We examine the space of surfaces in $\RR^{3}$ which are complete, properly embedded and have nonzero constant mean curvature. These surfaces are noncompact provided we exclude the case of the round sphere. We prove that the space $\Mk$ of…

dg-ga · Mathematics 2008-02-03 Rob Kusner , Rafe Mazzeo , Daniel Pollack

In this paper, we study the moduli spaces of canonical threefolds with any prescribed geometric genus $p_g \ge 5$ which have the smallest possible canonical volume. This minimal volume is equal to the smallest half-integer that is larger…

Algebraic Geometry · Mathematics 2025-11-04 Stephen Coughlan , Yong Hu , Roberto Pignatelli , Tong Zhang

We give necessary conditions on complete embedded \cmc surfaces with three or four ends subject to reflection symmetries. The respective submoduli spaces are two-dimensional varieties in the moduli spaces of general \cmc surfaces. We…

dg-ga · Mathematics 2008-02-03 K. Brauckmann , R. Kusner

We count the connected components in the moduli space of PU(p,q)-representations of the fundamental group for a closed oriented surface. The components are labelled by pairs of integers which arise as topological invariants of the flat…

Algebraic Geometry · Mathematics 2015-06-26 Steven B. Bradlow , Oscar Garcia-Prada , Peter B. Gothen

A holomorphic triple over a compact Riemann surface consists of two holomorphic vector bundles and a holomorphic map between them. After fixing the topological types of the bundles and a real parameter, there exist moduli spaces of stable…

Algebraic Geometry · Mathematics 2016-09-07 Steven B. Bradlow , Oscar Garcia-Prada , Peter B. Gothen

In this paper, we show that there are non-properly embedded minimal surfaces with finite topology in a simply connected Riemannian 3-manifold with nonpositive curvature. We show this result by constructing a non-properly embedded minimal…

Differential Geometry · Mathematics 2015-03-17 Baris Coskunuzer

We prove that the moduli spaces of K3 surfaces with non-symplectic involutions are unirational. As a by-product we describe configuration spaces of 4<d<9 points in the projective plane as arithmetic quotients of type IV.

Algebraic Geometry · Mathematics 2014-02-26 Shouhei Ma

We prove that the moduli space of Calabi-Yau 3-folds coming from eight planes of $P^3$ in general positions is not modular. In fact we show the stronger statement that the Zariski closure of the monodromy group is actually the whole…

Algebraic Geometry · Mathematics 2007-09-10 Ralf Gerkmann , Sheng Mao , Kang Zuo

We show that, up to some natural normalizations, the moduli space of singly periodic complete embedded maximal surfaces in the Lorentz-Minkowski space $\l^3=(\r^3,dx_1^2+dx_2^2-dx_3^2),$ with fundamental piece having a finite number $(n+1)$…

Differential Geometry · Mathematics 2007-05-23 Isabel Fernandez , Francisco J. Lopez , Rabah Souam

We have studied irreducible real (respectively, quaternionic) Lie algebroid connections and prove that the Gauge theoretic moduli space has Hausdorff Hilbert manifold structure. This work generalises some known results about simple…

Differential Geometry · Mathematics 2024-12-04 Ayush Jaiswal

We are interested in the question of the existence of flat manifolds for which all $\mathbb R$-irreducible components of the holonomy representation are either absolutely irreducible, of complex or of quaternionic type. In the first two…

Group Theory · Mathematics 2020-02-19 Gerhard Hiss , Rafał Lutowski , Andrzej Szczepański

In this paper we survey a number of recent results concerning the existence and moduli spaces of solutions of various geometric problems on noncompact manifolds. The three problems which we discuss in detail are: I. Complete properly…

dg-ga · Mathematics 2008-02-03 Rafe Mazzeo , Daniel Pollack

Let $M$ be a Milnor sphere or, more generally, the total space of a linear $S^3$-bundle over $S^4$ with $H^4(M;\mathbb{Q})=0$. We show that the moduli space of metrics of nonnegative sectional curvature on $M$ has infinitely many path…

Differential Geometry · Mathematics 2018-01-23 Anand Dessai

We examine the moduli space of oriented locally homogeneous manifolds of Type A which have non-degenerate symmetric Ricci tensor both in the setting of manifolds with torsion and also in the torsion free setting where the dimension is at…

Differential Geometry · Mathematics 2016-07-07 Peter Gilkey , JeongHyeong Park

We prove that the moduli space of empty real Enriques surfaces (and, thus, the moduli space of compact orientable 4-dimensional Einstein manifolds whose universal covering is a K3-surface and \pi_1(E) = Z/2 x Z/2) is connected. The proof is…

alg-geom · Mathematics 2008-03-21 A. Degtyarev , V. Kharlamov
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