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We study moduli spaces of twisted maps to a smooth pair in arbitrary genus, and give geometric explanations for previously known comparisons between orbifold and logarithmic Gromov--Witten invariants. Namely, we study the space of twisted…

Algebraic Geometry · Mathematics 2025-01-28 Robert Crumplin

In each dimension $4k+1\geq 9$, we exhibit infinite families of closed manifolds with fundamental group $\mathbb Z_2$ for which the moduli space of metrics of nonnegative sectional curvature has infinitely many path components. Examples of…

Differential Geometry · Mathematics 2022-08-09 Anand Dessai

Studied are moduli spaces of self dual or anti-self dual connections on noncommutative 4-manifolds, especially deformation quantization of compact spin Riemannian 4-manifolds and their isometry groups have 2-torus subgroup. Then such moduli…

Differential Geometry · Mathematics 2007-05-23 Hiroshi Takai

We consider the general problem of constructing the structure of a smooth manifold on a given space of loops in a smooth finite dimensional manifold. By generalising the standard construction for smooth loops, we derive a list of conditions…

Differential Geometry · Mathematics 2007-05-23 Andrew Stacey

B. Csik\'os and M. Horv\'ath proved that if a connected Riemannian manifold of dimension at least $4$ is harmonic, then the total scalar curvatures of tubes of small radius about a regular curve depend only on the length of the curve and…

Differential Geometry · Mathematics 2021-11-11 Balázs Csikós , Amr Elnashar , Márton Horváth

We relate the theory of moduli spaces $\overline{\mathcal{M}}_{0,\mathcal{A}}$ of stable weighted curves of genus $0$ to the equivariant topology of complex Grassmann manifolds $G_{n,2}$, with the canonical action of the compact torus…

Algebraic Geometry · Mathematics 2024-10-03 Victor M. Buchstaber , Svjetlana Terzić

Moduli spaces of complete collineations are wonderful compactifications of spaces of linear maps of maximal rank between two fixed vector spaces. We investigate the birational geometry of moduli spaces of complete collineations and quadrics…

Algebraic Geometry · Mathematics 2020-08-26 Alex Massarenti

Many moduli spaces are constructed as quotients of group actions; this paper surveys the classical theory, as well as recent progress and applications. We review geometric invariant theory for reductive groups and how it is used to…

Algebraic Geometry · Mathematics 2023-03-01 Victoria Hoskins

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 construct proper good moduli spaces for moduli stacks of Bridgeland semistable orthosymplectic complexes on a complex smooth projective variety, which we propose as a candidate for compactifying moduli spaces of principal bundles for the…

Algebraic Geometry · Mathematics 2026-01-15 Chenjing Bu

We study analysis over infinite dimensional manifolds consisted by sequences of almost Kaehler manifolds. We develop moduli theory of pseudo holomorphic curves into such spaces with high symmetry. Many mechanisms of the standard moduli…

Symplectic Geometry · Mathematics 2012-05-15 Tsuyoshi Kato

We show a few basic results about moduli spaces of semistable modules over Lie algebroids. The first result shows that such moduli spaces exist for relative projective morphisms of noetherian schemes, removing some earlier constraints. The…

Algebraic Geometry · Mathematics 2022-11-15 Adrian Langer

We prove that the moduli space of complete Riemannian metrics of bounded geometry and uniformly positive scalar curvature on an orientable 3-manifold is path-connected. This generalizes the main result of the fourth author [Mar12] in the…

Differential Geometry · Mathematics 2017-11-10 Laurent Bessières , Gérard Besson , Sylvain Maillot , Fernando Coda Marques

We show that moduli spaces of transversely cut-out (perturbed) pseudo-holomorphic curves in an almost complex manifold carry canonical relative smooth structures ("relative to the moduli space of domain curves"). The main point is that…

Symplectic Geometry · Mathematics 2020-10-01 Mohan Swaminathan

We study the moduli space of A-infinity structures on a topological space as well as the moduli space of A-infinity-ring structures on a fixed module spectrum. In each case we show that the moduli space sits in a homotopy fiber sequence in…

Algebraic Topology · Mathematics 2014-11-04 John R. Klein , Sean Tilson

We give criterions for the existence of toric conical Kahler-Einstein and Kahler-Ricci soliton metrics on any toric manifold in relation to the greatest Ricci and Bakry-Emery-Ricci lower bound. We also show that any two toric manifolds with…

Differential Geometry · Mathematics 2013-09-02 Ved Datar , Bin Guo , Jian Song , Xiaowei Wang

Let $G$ be a compact connected semisimple Lie group. We extend the techniques of Weinstein [W] to give a construction in group cohomology of symplectic forms $\omega$ on \lq twisted' moduli spaces of representations of the fundamental group…

alg-geom · Mathematics 2008-02-03 Lisa C. Jeffrey

We study the moduli space of flat maximal space-like embeddings in $\mathbb{H}^{2,2}$ from various aspects. We first describe the associated Codazzi tensors to the embedding in the general setting, and then, we introduce a family of…

Differential Geometry · Mathematics 2023-10-20 Nicholas Rungi , Andrea Tamburelli

We study the wall-crossing for moduli spaces of coherent systems of dimension one and order one on a smooth projective variety over the complex numbers. We compute the topological Euler characteristic of the moduli spaces in the particular…

Algebraic Geometry · Mathematics 2022-04-05 Mario Maican

We study the moduli spaces of flat surfaces with prescribed conical singularities. Veech showed that these spaces are diffeomorphic to the moduli spaces of marked Riemann surfaces, and endowed with a natural volume form depending on the…

Algebraic Geometry · Mathematics 2024-01-03 Adrien Sauvaget