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27 papers · 1 filter
Evolutionary model with genetics, aging and knowledge
Armando Ticona Bustillos, Paulo Murilo C. de Oliveira
We represent a process of learning by using bit strings, where 1-bits represent the knowledge acquired by individuals. Two ways of learning are considered: individual learning by t…
The nuclear pseudospin symmetry along an isotopic chain
R. Lisboa, M. Malheiro, P. Alberto
We investigate the isospin dependence of pseudospin symmetry in the chain of tin isotopes (from Sn until Sn). Using a Woods-Saxon parametrization of the nuclear pot…
Heavy fermion d-wave superconductivity: a X-boson approach
Lizardo H. C. M. Nunes, M. S. Figueira, E. V. L. de Melllo
From an extension of the periodic Anderson model (PAM) in the limit taking into account the effect of a nearest neighbor attractive interaction between -electrons…
Uniform hyperbolicity for random maps with positive Lyapunov exponents
Yongluo Cao, Stefano Luzzatto, Isabel Rios
We consider some general classes of random dynamical systems and show that a priori very weak nonuniform hyperbolicity conditions actually imply uniform hyperbolicity.
A general creation-annihilation model with absorbing states
Wellington G. Dantas, Armando Ticona, Jurgen F. Stilck
A one dimensional non-equilibrium stochastic model is proposed where each site of the lattice is occupied by a particle, which may be of type A or B. The time evolution of the mode…
A minimum principle for Lyapunov exponents and a higher-dimensional version of a Theorem of Mane'
Yongluo Cao, Stefano Luzzatto, Isabel Rios
We consider compact invariant sets Λfor C^{1} maps in arbitrary dimension. We prove that if Λcontains no critical points then there exists an invariant probability measure with a L…