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11 papers · 1 filter
Current algebra functors and extensions
Anton Alekseev, Pavol Severa, Cornelia Vizman
We show how the fundamental cocycles on current Lie algebras and the Lie algebra of symmetries for the sigma model are obtained via the current algebra functors. We present current…
Covariant representations of the de Sitter isometry group
Ion I. Cotaescu
We show that the induced representations of the de Sitter isometry group proposed many years ago by Nachtmann are equivalent to those derived from our general theory of external sy…
Geophysical applicability of atomic clocks: direct continental geoid mapping
Ruxandra Bondarescu, Mihai Bondarescu, György Hetényi +3
The geoid is the true physical figure of the Earth, a particular equipotential surface of the gravity field of the Earth that accounts for the effect of all subsurface density vari…
Improved approximation algorithms for low-density instances of the Minimum Entropy Set Cover Problem
Cosmin Bonchis, Gabriel Istrate
We study the approximability of instances of the minimum entropy set cover problem, parameterized by the average frequency of a random element in the covering sets. We analyze an a…
Complete integrability versus symmetry
Răzvan M. Tudoran
The purpose of this article is to show that on an open and dense set, complete integrability implies the existence of symmetry.
Decentralized Probabilistic Auto-Scaling for Heterogeneous Systems
Bogdan Alexandru Caprarescu, Dana Petcu
The DEPAS (Decentralized Probabilistic Auto-Scaling) algorithm assumes an overlay network of computing nodes where each node probabilistically decides to shut down, allocate one or…