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The moduli space of triangles is a two-dimensional space that records triangle shapes in the plane, considered up to similarity. We study the subset corresponding to \textit{lattice triangles}, which are triangles whose vertices have…

Metric Geometry · Mathematics 2026-04-02 Aahana Aggarwal , Subhojoy Gupta , Ajay K. Nair

Finite-order invariants of knots in arbitrary 3-manifolds (including non-orientable ones) are constructed and studied by methods of the topology of discriminant sets. Obstructions to the integrability of admissible weight systems to…

Geometric Topology · Mathematics 2016-09-07 Victor A. Vassiliev

This note is about invariants of moduli spaces of curves. It includes their intersection theory and cohomology. Our main focus in on the distinguished piece containing the so called tautological classes. These are the most natural classes…

Algebraic Geometry · Mathematics 2016-11-01 Mehdi Tavakol

This paper aims to undertake an exploration of the behavior of the moduli space of line arrangements while establishing its combinatorial interplay with the incidence structure of the arrangement. In the first part, we investigate…

Algebraic Geometry · Mathematics 2024-02-26 Benoît Guerville-Ballé , Juan Viu-Sos

In this short article we investigate the topology of the moduli space of two-convex embedded tori $S^{n-1}\times S^1\subset \mathbb{R}^{n+1}$. We prove that for $n \geq 3$ this moduli space is path-connected, and that for $n = 2$ the…

Differential Geometry · Mathematics 2021-10-14 Reto Buzano , Robert Haslhofer , Or Hershkovits

We consider local invariants of general connections (with torsion). The group of origin-preserving diffeomorphisms acts on a space of jets of general connections. Dimensions of moduli spaces of generic connections are calculated. Poincar\'e…

Differential Geometry · Mathematics 2010-10-27 Stanislav Dubrovskiy

We present two models for the space of knots which have endpoints at fixed boundary points in a manifold with boundary, one model defined as an inverse limit of spaces of maps between configuration spaces and another which is cosimplicial.…

Algebraic Topology · Mathematics 2009-03-17 Dev P. Sinha

In this paper, we give a classification of the 3-dimensional associative algebras over the complex numbers, including a construction of the moduli space, using versal deformations to determine how the space is glued together.

Representation Theory · Mathematics 2008-07-22 Alice Fialowski , Michael Penkava

This is a note on calculating intersection numbers on moduli spaces of curves. A codimension 3 relation among tautological classes on the moduli space of genus 4 curves is given.

Algebraic Geometry · Mathematics 2010-03-03 Stephanie Yang

This paper discusses some geometric ideas associated with knots in real projective 3-space $\mathbb{R}P^3$. These ideas are borrowed from classical knot theory. Since knots in $\mathbb{R}P^3$ are classified into three disjoint classes, -…

Geometric Topology · Mathematics 2023-11-03 Rama Mishra , Visakh Narayanan

As an introduction to the concept of "moduli space" we consider the moduli space of similarity classes of acute and right triangles in the plane. This has a map to the moduli space of elliptic curves which is onto and generically…

Algebraic Geometry · Mathematics 2025-07-30 John Carlos Baez

We show how to define and count lattice points in the moduli space $\modm_{g,n}$ of genus g curves with n labeled points. This produces a polynomial with coefficients that include the Euler characteristic of the moduli space, and…

Algebraic Geometry · Mathematics 2008-01-31 Paul Norbury

The moduli space of regular stable maps with values in a complex manifold admits naturally the structure of a complex orbifold. Our proof uses the methods of differential geometry rather than algebraic geometry. It is based on Hardy…

Symplectic Geometry · Mathematics 2012-05-09 Joel Robbin , Yongbin Ruan , Dietmar Salamon

We identify certain Gromov-Witten invariants counting rational curves with given incidence and tangency conditions with the Betti numbers of moduli spaces of point configurations in projective spaces. On the Gromov-Witten side, S. Fomin and…

Algebraic Geometry · Mathematics 2018-03-22 Markus Reineke , Thorsten Weist

We define and count lattice points in the moduli space of stable genus g curves with n labeled points. This extends a construction of the second author for the uncompactified moduli space. The enumeration produces polynomials with top…

Geometric Topology · Mathematics 2014-11-11 Norman Do , Paul Norbury

We classify parallelizable noncommutative manifold structures on finite sets of small size in the general formalism of framed quantum manifolds and vielbeins introduced previously. The full moduli space is found for $\le 3$ points, and a…

General Relativity and Quantum Cosmology · Physics 2009-11-10 S. Majid , E. Raineri

Simple closed curves in the plane can be mapped to nontrivial knots under the action of origami foldings that allow the paper to self-intersect. We show all tame knot types may be produced in this manner, motivating the development of a new…

Geometric Topology · Mathematics 2021-05-05 Joseph Slote , Thomas Bertschinger

A connection between moduli spaces of algebro-geometric objects and moduli spaces of polyhedral objects has been under investigation in recent years. Loosely speaking, the skeleton of an algebro-geometric moduli space is expressed as the…

Algebraic Geometry · Mathematics 2018-01-08 Lucia Caporaso

After introducing some motivations for this survey, we describe a formalism to parametrize a wide class of algebraic structures occurring naturally in various problems of topology, geometry and mathematical physics. This allows us to define…

Algebraic Topology · Mathematics 2016-12-16 Sinan Yalin

We construct the moduli space of r-jets at a point of Riemannian metrics on a smooth manifold. The construction is closely related to the problem of classification of jet metrics via differential invariants. The moduli space is proved to be…

Differential Geometry · Mathematics 2011-01-14 A. Gordillo , J. Navarro , J. B. Sancho
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