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We construct a category of examples of partially hyperbolic geodesic flows which are not Anosov, deforming the metric of a compact locally symmetric space of nonconstant negative curvature. Candidates for such example as the product metric…

Dynamical Systems · Mathematics 2013-03-12 Fernando A. Carneiro , Enrique R. Pujals

It is argued that chiral algebras of conformal field theory possess a W-algebra structure. A survey of explicitly known W-algebras and their constructions is given. (Talk given at the XIX International Colloquium on ``Group Theoretical…

High Energy Physics - Theory · Physics 2007-05-23 H. G. Kausch

In the context of metric $f(R)$ gravity, the Geodesic Deviation Equation (GDE) was first studied in arXiv:1010.5279v3, giving a general expression and studying a particular case, the FLRW universe. In the paper arXiv:1312.2022v1 a similar…

General Relativity and Quantum Cosmology · Physics 2015-09-04 Alejandro Guarnizo , Leonardo Castaneda , Juan M. Tejeiro

We prove existence of a measurable Riemannian structure on higher-dimensional harmonic Sierpinski gasket fractals and deduce Gaussian heat kernel bounds in the geodesic metric. Our proof differs from that given by Kigami for the usual…

Classical Analysis and ODEs · Mathematics 2017-03-10 Sara Chari , Joshua Frisch , Daniel J. Kelleher , Luke G. Rogers

This erratum corrects the proof given in \cite{E1,E2} about the existence of $ 3D $ Skyrmions. This is done by changing the arguments of the proof while remaining in the same framework of concentration-compactness. Note however that the use…

Mathematical Physics · Physics 2009-11-10 Maria J. Esteban

The purpose of this erratum is to correct the proof of Theorem A.0.1 in the appendix to our article ``Hadamard spaces with isolated flats'' math.GR/0411232, which was jointly authored by Mohamad Hindawi, Hruska and Kleiner. In that…

Group Theory · Mathematics 2014-11-11 G. Christopher Hruska , Bruce Kleiner

We consider the diagonal limit of the conformal bootstrap in arbitrary dimensions and investigate the question if physical theories are given in terms of cyclic polytopes. Recently, it has been pointed out that in $d=1$, the geometric…

High Energy Physics - Theory · Physics 2019-11-19 Kallol Sen , Aninda Sinha , Ahmadullah Zahed

In our paper "Dendroidal sets as models for homotopy operads" (J. Topol. 4 (2011), no. 2, 257-299, and arXiv:0902.1954), we made the wrong claim about the behaviour of the tensor product with respect to cofibrations of dendroidal sets. We…

Algebraic Topology · Mathematics 2014-03-27 Denis-Charles Cisinski , Ieke Moerdijk

We use covariant techniques to examine the implications of the dynamical equivalence between geodesic motions and adiabatic hydrodynamic flows. Assuming that the metrics of a geodesically and a non-geodesically moving fluid are conformally…

General Relativity and Quantum Cosmology · Physics 2016-08-31 N. K. Spyrou , C. G. Tsagas

We consider real isotropic geodesics on manifolds endowed with a pseudoconformal structure and their applications to the theory of lightlike hypersurfaces on such manifolds, the geometry of four-dimensional conformal structures of…

Differential Geometry · Mathematics 2007-05-23 Maks A. Akivis , Vladislav V. Goldberg

In this article, we summarize the results on symmetric conformal geometries. We review the results following from the general theory of symmetric parabolic geometries and prove several new results for symmetric conformal geometries. In…

Differential Geometry · Mathematics 2016-02-08 Jan Gregorovič , Lenka Zalabová

Friedrich's proofs for the global existence results of de Sitter-like space-times and of semi-global existence of Minkowski-like space-times [Comm. Math. Phys. \textbf{107}, 587 (1986)] are re-examined and discussed, making use of the…

General Relativity and Quantum Cosmology · Physics 2009-07-24 C. Lübbe , J. A. Valiente Kroon

Quintino et. al. (Phys. Rev. Lett. 113, 160402 (2014)) and Uola et. al. (Phys. Rev. Lett. 113, 160403 (2014)) have recently established an intrinsic relation between non-joint measurability and Einstein-Podolsky- Rosen steering. They showed…

Quantum Physics · Physics 2015-05-19 H. S. Karthik , J. Prabhu Tej , A. R. Usha Devi , A. K. Rajagopal

We give examples of spin $4$-manifolds with boundary $(M,\partial M)$ such that the boundary $\partial M$ has a positive scalar curvature metric which cannot be extended to a positive scalar curvature metric on $M$ with mean convex…

Differential Geometry · Mathematics 2026-01-08 Steven Rosenberg , Daniel Ruberman , Jie Xu

This is erratum of the paper [Phys. Rev. Lett. {\bf 84}, 4260 (2000)]

Quantum Physics · Physics 2007-05-23 Michal Horodecki , Pawel Horodecki , Ryszard Horodecki

Using methods of phenomenological non-equilibrium thermodynamics, the proof is performed that Jarzynski's equality is only valid in the reversible limit and that a conclusion to non-equilibrium inequalities concerning free energy and work…

Mathematical Physics · Physics 2013-07-02 Wolfgang Muschik

In a recent paper, a new conformally flat metric was introduced, describing an expanding scalar field in a spherically symmetric geometry. The spacetime can be interpreted as a Schwarzschild-like model with an apparent horizon surrounding…

General Relativity and Quantum Cosmology · Physics 2023-03-16 Pantelis S. Apostolopoulos , Christos Tsipogiannis

The behavior of geodesic curves on even seemingly simple surfaces can be surprisingly complex. In this paper we use the Hamiltonian formulation of the geodesic equations to analyze their integrability properties. In particular, we examine…

Dynamical Systems · Mathematics 2011-12-15 Thomas J. Waters

It turns out that complex geodesics in Teichm\"uller spaces with respect to their invariant metrics are intrinsically connected with variational calculus for univalent functions. We describe this connection and show how geometric features…

Complex Variables · Mathematics 2016-11-01 Samuel L. Krushkal

We consider the interpretation in classical geometry of conformal field theories constructed from orbifolds with discrete torsion. In examples we can analyze, these spacetimes contain ``stringy regions'' that from a classical point of view…

High Energy Physics - Theory · Physics 2010-04-07 Cumrun Vafa , Edward Witten