Results 91 to 100 of about 399,425 (214)
Galois theory and projective geometry [PDF]
arXiv, 2011 We explore connections between birational anabelian geometry and abstract projective geometry. One of the applications is a proof of a version of the birational section conjecture.
arxiv
Holographic excited states in AdS black holes
Journal of High Energy Physics, 2019 We have recently presented a geometry dual to a Schwinger-Keldysh closed time contour, with two equal β/2 length Euclidean sections, which can be thought of as dual to the Thermo Field Dynamics formulation of the boundary CFT.
Marcelo Botta-Cantcheff +2 more
doaj +1 more source
Liquid crystal director fields in three-dimensional non-Euclidean geometries
New Journal of Physics, 2020 This paper investigates nematic liquid crystals in three-dimensional curved space, and determines which director deformation modes are compatible with each possible type of non-Euclidean geometry. Previous work by Sethna et al showed that double twist is
Jean-François Sadoc +2 more
doaj +1 more source
Rationality in Differential Algebraic Geometry [PDF]
arXiv, 2014 Parametric Cartan theory of exterior differential systems, and explicit cohomology of projective manifolds reveal united rationality features of differential algebraic geometry.
arxiv
From Metaphysics to Metachemistry [PDF]
, 2006 In 1940 appeared La Philosophie du Non by Gaston Bachelard. The American edition of 1968 translates the title obviously enough as The Philosophy of No and 10 years later, the German followed with Die Philosophie des Nein.
Nordmann, Alfred
core
Hessian Geometry and Phase Change of Gibbons-Hawking Metrics [PDF]
arXiv, 2018 We study the Hessian geometry of toric Gibbons-Hawking metrics and their phase change phenomena via the images of their moment maps.
arxiv
Logarithmic corrections for near-extremal black holes
Journal of High Energy PhysicsWe present the computation of logarithmic corrections to near-extremal black hole entropy from one-loop Euclidean gravity path integral around the near-horizon geometry. We extract these corrections employing a suitably modified heat kernel method, where
Nabamita Banerjee +2 more
doaj +1 more source
A new view of combinatorial maps by Smarandache's notion [PDF]
arXiv, 2005 On a geometrical view, the conception of map geometries are introduced, which is a nice model of the Smarandache geometries, also new kind of and more general intrinsic geometry of surface. Results convinced one that map geometries are Smarandache geometries and their enumertion are obtained.
arxiv
Grassmannians of lines defined in the geometry of a pseudo-polarity [PDF]
arXiv, 2012 The regular point-line geometry with respect to a pseudo-polarity is introduced. It is weaker than the underlying metric-projective geometry. The automorphism group of this geometry is determined. This geometry can be also expressed as the geometry of regular lines and planes.
arxiv
Transformation optics with artificial Riemann sheets
New Journal of Physics, 2013 The two original versions of ‘invisibility’ cloaks (Leonhardt 2006 Science 312 1777–80 and Pendry et al 2006 Science 312 1780–2) show perfect cloaking but require unphysical singularities in material properties.
Lin Xu, Huanyang Chen
doaj +1 more source