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This paper provides details of the construction, properties and some applications of the ambient metric associated to a conformal class of metrics on a smooth manifold. Existence and uniqueness of formal expansions defining such metrics are…

Differential Geometry · Mathematics 2008-10-22 Charles Fefferman , C. Robin Graham

A classical theorem of Riemannian geometry, due in its original form to Cartan, states that the Taylor expansion of the metric in geodesic normal coordinates is a universal formal power series involving only the symmetrizations of the…

Differential Geometry · Mathematics 2026-01-15 Tillmann Jentsch

An extension of the ambient metric construction of Fefferman-Graham to infinite order in even dimensions is described. The main ingredients are the introduction of "inhomogeneous ambient metrics" with asymptotic expansions involving the…

Differential Geometry · Mathematics 2007-05-23 C. Robin Graham , Kengo Hirachi

In this paper we construct the jet geometrical extensions of the KCC-invariants, which characterize a given second-order system of differential equations on the 1-jet space $J^1(R,M)$. A generalized theorem of characterization of our jet…

Differential Geometry · Mathematics 2010-03-30 Vladimir Balan , Mircea Neagu

If a morphism of germs of schemes induces isomorphisms of all local jet schemes, does it follow that the morphism is an isomorphism? This problem is called the local isomorphism problem. In this paper, we use jet schemes to introduce…

Algebraic Geometry · Mathematics 2018-01-15 Tommaso de Fernex , Lawrence Ein , Shihoko Ishii

In this paper, we study the asymptotic structure of the Fefferman-Graham ambient metric. We prove that every straight ambient metric admits a conformal completion with a well-defined null infinity, and that the asymptotic expansion of the…

General Relativity and Quantum Cosmology · Physics 2025-10-27 Marc Mars , Gabriel Sánchez-Pérez

Homotopy is an important feature of associative and Jordan algebraic structures: such structures always come in families whose members need not be isomorphic among other, but still share many important properties. One may regard homotopy as…

Rings and Algebras · Mathematics 2007-05-23 Wolfgang Bertram

An overview of some recent results on the geometry of partial differential equations in application to integrable systems is given. Lagrangian and Hamiltonian formalism both in the free case (on the space of infinite jets) and with…

Differential Geometry · Mathematics 2012-12-19 Joseph Krasil'shchik , Alexander Verbovetsky

This is a survey paper of our current research on the theory of partial differential equations in conformal geometry. Our intention is to describe some of our current works in a rather brief and expository fashion. We are not giving a…

Differential Geometry · Mathematics 2008-04-25 Sun-Yung A. Chang , Jie Qing , Paul Yang

We discuss solutions of several questions concerning the geometry of conformal planes.

Differential Geometry · Mathematics 2022-11-29 Alexander Lytchak

The paper develops the Finsler-like geometry on the 1-jet space for the jet conformal Minkowski (JCM) metric, which naturally extends the Minkowski metric in the Chernov-Pavlov framework. To this aim there are determined the nonlinear…

Differential Geometry · Mathematics 2011-11-21 Vladimir Balan , Mircea Neagu

This article describes the symmetries of plane wave spacetimes in dimension four and greater. It begins with a description of the isometric automorphisms, and in particular the homogeneous plane waves. Then the article turns to describing…

Mathematical Physics · Physics 2024-12-17 Jonathan Holland , George Sparling

An intrinsic definition in terms of conformal capacity is proposed for the conformal type of a Carnot--Carath\'eodory space (parabolic or hyperbolic). Geometric criteria of conformal type are presented. They are closely related to the…

Differential Geometry · Mathematics 2016-09-06 Vladimir A. Zorich

In this essay we give an introduction to conformal symmetry, based on the example of the Yamabe operator and its use in conformal differential geometry, and in representation theory.

Differential Geometry · Mathematics 2026-03-12 Bent Ørsted

We give a new variant of $L^2$-extension theorem for the jets of holomorphic sections and discuss the relation between the extension problem of singular Hermitian metrics with semipositive curvature.

Complex Variables · Mathematics 2012-09-25 Tomoyuki Hisamoto

This paper surveys some selected topics in the theory of conformal metrics and their connections to complex analysis, partial differential equations and conformal differential geometry.

Complex Variables · Mathematics 2008-05-16 Daniela Kraus , Oliver Roth

The use of jet modification to study the properties of dense matter is reviewed. Different sets of jet correlations measurements which may be used to obtain both the space-time and momentum space structure of the produced matter are…

Nuclear Theory · Physics 2009-01-16 A. Majumder

In this paper, we explore the use of jet substructure as a way of probing phenomena which break the isotropic behavior of jets, such as jet propagation through an anisotropically flowing quark-gluon plasma or spin correlations. We introduce…

High Energy Physics - Phenomenology · Physics 2024-12-18 Weiyao Ke , John Terry , Ivan Vitev

In this paper, we develop a cohomology theory of a left-symmetric conformal algebra and study its some applications. We define the cohomology of a left-symmetric conformal algebra, and then give an isomorphism between the cohomology spaces…

Rings and Algebras · Mathematics 2022-12-13 Jun Zhao , Bo Hou

We study infinitesimal conformal deformations of a triangulated surface in Euclidean space and investigate the change in its extrinsic geometry. A deformation of vertices is conformal if it preserves length cross-ratios. On one hand,…

Metric Geometry · Mathematics 2018-04-19 Wai Yeung Lam , Ulrich Pinkall
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