Concept
Negative mass
Related publications (33)
On the Generalization of Stochastic Gradient Descent with Momentum
Volkan Cevher, Kimon Antonakopoulos
While momentum-based accelerated variants of stochastic gradient descent (SGD) are widely used when training machine learning models, there is little theoretical understanding on the generalization error of such methods. In this work, we first show that th ...
Brookline2024A proof of the instability of AdS for the Einstein-massless Vlasov system
In recent years, the conjecture on the instability of Anti-de Sitter spacetime, put forward by Dafermos-Holzegel (Dynamic instability of solitons in 4 + 1 dimesnional gravity with negative cosmological constant, 2006. https://www.dpmms.cam.ac.uk/similar to ...
SPRINGER HEIDELBERG2022Tomographic reconstruction of the runaway distribution function in TCV using multispectral synchrotron images
Basil Duval, Joan Decker, Umar Sheikh, Artur Perek, Gergely Papp
Synchrotron radiation observed in a quiescent Tokamak a Configuration Variable (TCV) runaway discharge is studied using filtered camera images targeting three distinct wavelength intervals. Through the tomographic simultaneous algebraic reconstruction tech ...
IOP PUBLISHING LTD2021Einstein-Cartan gravity, matter, and scale-invariant generalization
Andrey Shkerin, Inar Timiryasov, Sebastian Zell
We study gravity coupled to scalar and fermion fields in the Einstein-Cartan framework. We discuss the most general form of the action that contains terms of mass dimension not bigger than four, leaving out only contributions quadratic in curvature. By res ...
SPRINGER2020Runaway electron modelling in the self-consistent core European Transport Simulator
Relativistic runaway electrons are a major concern in tokamaks. Although significant theoretical development had been undertaken in recent decades, we still lack a self-consistent simulator that could simultaneously capture all aspects of this phenomenon. ...
IOP PUBLISHING LTD2019Advanced gravitational lensing techniques for precision cosmology
Gravitational lensing - the deflection of light by gravity - has greatly developed since its famous first observation in 1919, which validated Einstein's General Theory of Relativity. The strength of this effect does not depend on the nature of the mass wh ...
EPFL2018Emergence of Friedmann Equation of Cosmology of a Flat Universe from the Time-Energy Uncertainty Principle
Friedmann equation of cosmology is based on the field equations of general relativity. Its derivation is straight-forward once the Einstein’s field equations are given and the derivation is independent of quantum mechanics. In this paper, it is shown that ...
2017