Results 141 to 150 of about 73,082 (280)
The simplicity of physical laws
Noûs, EarlyView.Abstract Physical laws are strikingly simple, yet there is no a priori reason for them to be so. I propose that nomic realists—Humeans and non‐Humeans—should recognize simplicity as a fundamental epistemic guide for discovering and evaluating candidate physical laws.
Eddy Keming Chen
wiley +1 more source
Provocative Vocatives: Slurs as Expressives
Philosophical Perspectives, EarlyView.ABSTRACT Fifty years ago, Zwicky demonstrated the slur‐neutral counterpart vocative divergence thesis (SNCVD):Slurs occur freely as vocatives. Neutral counterparts do not. In this article, I craft a novel problem for theories of slurs. The Vocatives Problem is the challenge to explain the SNCVD. I argue that there are two strong solutions.
Robin Jeshion
wiley +1 more source
Hidden Symmetries of Euclideanised Kerr-NUT-(A)dS Metrics in Certain Scaling Limits
Symmetry, Integrability and Geometry: Methods and Applications, 2012 The hidden symmetries of higher dimensional Kerr-NUT-(A)dS metrics are investigated. In certain scaling limits these metrics are related to the Einstein-Sasaki ones.
Mihai Visinescu, Eduard Vîlcu
doaj +1 more source
The η-Einstein condition on indefinite S-manifolds
Mathematica Slovaca, 2014 Abstract An η-Einstein condition is introduced in the context of indefinite globally framed f-manifolds, and several Schur-type results for indefinite S-manifolds are proved.
openaire +4 more sources
Journal of Economic Surveys, Volume 39, Issue 3, Page 806-840, July 2025.Abstract We provide a survey of the main mechanisms of market selection used in economics. We categorize existing theories into three broad classes—evolutionary selection, reduced form selection, and rational equilibrium—based on their adopted selection mechanisms.
Luca Fontanelli
wiley +1 more source
Generalized teleparallel de Sitter geometries. [PDF]
Eur Phys J C Part Fields, 2023 Coley AA +3 more
europepmc +1 more source
Femtosecond Pulse Shaping with Semiconductor Huygens' Metasurfaces
Advanced Optical Materials, Volume 13, Issue 16, June 6, 2025.Spatially variant silicon Huygens' metasurfaces enable femtosecond pulse shaping by tailoring the spectral phase and amplitude of incident pulses. Two key functionalities are demonstrated: temporal stretching and pulse splitting of an input Gaussian pulse.
Katsuya Tanaka +10 more
wiley +1 more source
A new variational method for finding Einstein metrics on compact Kähler manifolds, I
, 1988 Melvyn S. Berger, Pascal Cherrier
openalex +1 more source
Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens
Advanced Photonics Research, Volume 6, Issue 6, June 2025.This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan +5 more
wiley +1 more source