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5 papers · 1 filter
Kinetics of Particles in Relativistic Collisionless Shocks
Mikhail V. Medvedev, Luis O. Silva, Ricardo A. Fonseca +2
Charged plasma particles form an anisotropic counter-streaming distribution at the front of a shock. In the near- and ultra-relativistic regimes, Weibel (or two-stream) instability…
Characteristic-free bounds for the Castelnuovo-Mumford regularity
Giulio Caviglia, Enrico Sbarra
We study bounds for the Castelnuovo-Mumford regularity of homogeneous ideals in a polynomial ring in terms of the number of variables and the degree of the generators. In particula…
On a conjecture of Auslander and Reiten
Craig Huneke, Graham Leuschke
In studying Nakayama's 1958 conjecture on rings of infinite dominant dimension, Auslander and Reiten proposed the following generalization: Let Lambda be an Artin algebra and M a L…
Limits on thermal conduction in galaxy clusters
Mikhail V. Medvedev, Adrian L. Melott, Chris Miller +1
We have calculated lower limits for the global effective thermal conductivity in a sample of 165 Abell clusters. We assumed that cluster X-ray luminosity is compensated by a conduc…
The slopes determined by n points in the plane
Jeremy L. Martin
Let , , ..., be the slopes of the lines connecting points in general position in the plane. The ideal of all algebraic relation…