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We study the renormalized volume of a conformally compact Einstein manifold. In even dimensions, we derive the analogue of the Chern-Gauss-Bonnet formula incorporating the renormalized volume. When the dimension is odd, we relate the…

Differential Geometry · Mathematics 2007-05-23 Alice Chang , Jie Qing , Paul Yang

Generalized flag manifolds endowed with the Bruhat-Poisson bracket are compact Poisson homogeneous spaces, whose decompositions in symplectic leaves coincide with their stratifications in Schubert cells. In this note it is proved that the…

Quantum Algebra · Mathematics 2007-05-23 Jasper V. Stokman

We prove that the Losev--Manin compactification of the space of configurations of $n$ points on ${\mathbb P}^1 \backslash \{0,\infty\}$ modulo scaling degenerates (isotrivially) to a compactification of the space of configurations of $n$…

Algebraic Geometry · Mathematics 2024-01-23 Adrian Zahariuc

S. Axelrod and I.M. Singer constructed a compactification of the configuration space of distinct points in a Riemannian manifold V. A similar compactification for the moduli space of configurations of distinct points in the plane (mod the…

High Energy Physics - Theory · Physics 2007-05-23 Martin Markl

In this note, we study the general form of a multiplicative bijection on several families of functions defined on manifolds, both real or complex valued. In the real case, we prove that it is essentially defined by a composition with a…

Classical Analysis and ODEs · Mathematics 2011-11-22 Shiri Artstein-Avidan , Dmitry Faifman , Vitali Milman

In this paper we define a quantum version of the ``fusion'' tensor product of two representations of an affine Kac-Moody algebra.It is replaced by what we call fusion action of the category of finite-dimensional representations of quantum…

q-alg · Mathematics 2008-02-03 D. Kazhdan , Y. Soibelman

In this paper, we obtain formulas for the number of representations of positive integers as sums of arbitrarily many squares (and other polygonal numbers) with a certain natural weighting. The resulting weighted sums give Fourier…

Number Theory · Mathematics 2022-06-08 Min-Joo Jang , Ben Kane , Winfried Kohnen , Siu-Hang Man

We construct a locally finite connected graph whose Freudenthal compactification is universal for the class of completely regular continua, a class also known in the literature under the name thin or graph-like continua.

General Topology · Mathematics 2022-09-16 Jan Ouborny , Max Pitz

In this paper we study dually flat spaces arising from Delzant polytopes equipped with a symplectic potential together with their corresponding toric K\"ahler manifolds as their torifications.We introduce a dually flat structure and the…

Symplectic Geometry · Mathematics 2023-12-27 Hajime Fujita

The conformal compactification is considered in a hierarchy of hypercomplex projective spaces with relevance in physics including Minkowski and Anti-de Sitter space. The geometries are expressed in terms of bicomplex Vahlen matrices and…

General Mathematics · Mathematics 2017-05-23 S. Ulrych

In this informal expository note, we quickly introduce and survey compactifications of strata of holomorphic 1-forms on Riemann surfaces, i.e. spaces of translation surfaces. In the last decade, several of these have been constructed,…

Geometric Topology · Mathematics 2025-06-11 Benjamin Dozier

We prove that each bounded polytope can be represented as a polynomial zonotope, which we refer to as the Z-representation of polytopes. Previous representations are the vertex representation (V-representation) and the halfspace…

Combinatorics · Mathematics 2019-10-17 Niklas Kochdumper , Matthias Althoff

Let $X$ be a connected compact complex manifold admitting a finite surjective map $A \to X$ from a complex torus $A.$ We prove that up to finite \'etale cover, $X$ is a product of projective spaces and a torus.

Algebraic Geometry · Mathematics 2008-02-25 Jean-Pierre Demailly , Jun-Muk Hwang , Thomas Peternell

Let I be a finite set and CI be the algebra of functions on I. For a finite dimensional C algebra A with \CI contained in A we show that certain moduli spaces of finite dimsional modules are isomorphic to certain Grassmannian (quot-type)…

Algebraic Geometry · Mathematics 2010-09-02 Ian Shipman

In this paper we give an interpretation to the boundary points of the compactification of the parameter space of convex projective structures on an n-manifold M. These spaces are closed semi-algebraic subsets of the variety of characters of…

Geometric Topology · Mathematics 2014-10-01 Daniele Alessandrini

A simplified, user-friendly repackaging of the curvature estimates implied by the Seiberg-Witten equations is formulated in terms of the convex hull of the set of monopole classes. New results are also obtained concerning boundary cases of…

Differential Geometry · Mathematics 2007-05-23 Claude LeBrun

The moduli spaces of theta-semistable representations of a finite quiver can be packaged together to form a noncommutative compact manifold.

Algebraic Geometry · Mathematics 2016-09-07 Lieven Le Bruyn

We give a definition of a functor compactifying the functor of bundles on a surfaces. Earlier different authors have defined similar spaces as either images under a morphism or a quotient by an equivalence relation. We use the technique of…

Algebraic Geometry · Mathematics 2015-02-12 Vladimir Baranovsky

In 1969, P. Deligne and D. Mumford compactified the moduli space of curves. Their compactification is a projective algebraic variety, and as such, it has an underlying analytic structure. Alternatively, the quotient of the augmented…

Geometric Topology · Mathematics 2013-01-03 John H. Hubbard , Sarah Koch

We analyze the hamiltonian quantization of Chern-Simons theory associated to the universal covering of the Lorentz group SO(3,1). The algebra of observables is generated by finite dimensional spin networks drawn on a punctured topological…

High Energy Physics - Theory · Physics 2014-11-18 E. Buffenoir , K. Noui , P. Roche