Results 61 to 70 of about 228,756 (169)

On trialities and their absolute geometries [PDF]

arXiv, 2023
We introduce the notion of moving absolute geometry of a geometry with triality and show that, in the classical case where the triality is of type $(I_\sigma)$ and the absolute geometry is a generalized hexagon, the moving absolute geometry also gives interesting flag-transitive geometries with Buekenhout diagram with parameters $(d_p, g, d_L) = (5, 3,
arxiv  

Invariants of contact sub-pseudo-Riemannian structures and Einstein-Weyl geometry

, 2015
We consider local geometry of sub-pseudo-Riemannian structures on contact manifolds. We construct fundamental invariants of the structures and show that the structures give rise to Einstein-Weyl geometries in dimension 3, provided that certain additional
Grochowski, Marek, Krynski, Wojciech
core   +1 more source

Notes on Characterizations of 2d Rational SCFTs: Algebraicity, Mirror Symmetry, and Complex Multiplication

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract S. Gukov and C. Vafa proposed a characterization of rational N=(1,1)$N=(1,1)$ superconformal field theories (SCFTs) in 1+1$1+1$ dimensions with Ricci‐flat Kähler target spaces in terms of the Hodge structure of the target space, extending an earlier observation by G. Moore.
Abhiram Kidambi, Masaki Okada, Taizan Watari   +2 more
wiley   +1 more source

Geometry of symplectic log Calabi-Yau pairs [PDF]

arXiv, 2018
We will survey some aspects of the smooth topology, algebraic geometry, symplectic geometry and contact geometry of anti-canonical pairs in complex dimension two.
arxiv  

Control of Nonholonomic Systems and Sub-Riemannian Geometry [PDF]

, 2013
Lectures given at the CIMPA School "Geometrie sous-riemannienne", Beirut, Lebanon ...
Jean, Frederic
core   +1 more source

Moving frames for cotangent bundles

, 2002
Cartan's moving frames method is a standard tool in riemannian geometry. We set up the machinery for applying moving frames to cotangent bundles and its sub-bundles defined by non-holonomic constraints.Comment: 13 pages, to appear in Rep.
Ehlers, K. M., Koiller, J., Rios, P. de M.   +2 more
core   +1 more source

Comparing Manual and Automatic Artifact Detection in Sleep EEG Recordings

Psychophysiology, Volume 62, Issue 2, February 2025.
ABSTRACT Sleep electroencephalogram (EEG) recordings can be contaminated by artifacts. Visual and automatic methods have been developed to mark such erroneous segments of EEG data. Here, we systematically explored the effect of artifacts on the sleep EEG power spectrum density (PSD), and we compared gold‐standard visual detections to a simple automatic
Péter P. Ujma, Martin Dresler, Róbert Bódizs   +2 more
wiley   +1 more source

Abel Prize 2009 as a necessitation to discussion on geometry, or physicist versus geometers [PDF]

arXiv, 2009
Contemporary geometers do not acknowledge nonaxomatizable geometries. This fact means that our knowledge of geometry is poor. A perfect knowledge of geometry is important for "consumers of geometry" (physicists dealing with geometry of microcosm), because poor knowledge of geometry forces physicists to refuse from the orthodox geometrical paradigm and ...
arxiv  

A survey on Inverse mean curvature flow in ROSSes

Complex Manifolds, 2017
In this survey we discuss the evolution by inverse mean curvature flow of star-shaped mean convex hypersurfaces in non-compact rank one symmetric spaces.
Pipoli Giuseppe
doaj   +1 more source

Torsion‐free connections of second‐order maximally superintegrable systems

Bulletin of the London Mathematical Society, Volume 57, Issue 2, Page 565-581, February 2025.
Abstract Second‐order (maximally) conformally superintegrable systems play an important role as models of mechanical systems, including systems such as the Kepler–Coulomb system and the isotropic harmonic oscillator. This paper is dedicated to understanding non‐ and semi‐degenerate systems.
Andreas Vollmer
wiley   +1 more source