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112 papers · 1 filter
On growth and torsion of groups
Laurent Bartholdi, Floriane Pochon
We give a subexponential upper bound and a superpolynomial lower bound on the growth function of the Fabrykowski-Gupta group. As a consequence, we answer negatively a question by L…
At the Bottom of the Main Sequence: Activity and magnetic fields beyond the threshold to complete convection
Ansgar Reiners
The bottom of the main sequence hosts objects with fundamentally different properties. At masses of about 0.3 M, stars become fully convective and at about 0.08 M$_{\odot…
Properties of the , , , , and mesons and their relevance for the polarizabilities of the nucleon
Martin Schumacher
The signs and values of the two-photon couplings of mesons and their couplings to the nucleon as entering into the -channel parts of the difference of…
Dynamical synapses causing self-organized criticality in neural networks
Anna Levina, J. Michael Herrmann, Theo Geisel
We show that a network of spiking neurons exhibits robust self-organized criticality if the synaptic efficacies follow realistic dynamics. Deriving analytical expressions for the a…
First measurement of the forward-backward charge asymmetry in top quark pair production
D0 Collaboration, V. M. Abazov
We present the first measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus…
A new period determination for the close PG1159 binary SDSSJ212531.92-010745.9
S. Schuh, I. Traulsen, T. Nagel +6
Methods to measure masses of PG1159 stars in order to test evolutionary scenarios are currently based on spectroscopic masses or asteroseismological mass determinations. One recent…