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The paper presents a new method for solving power system nonlinear algebraic problems. It may be considered either as a… Expand Abstract In continuing joint work with Walter Neumann, we consider the relationship between three different points of view in… Expand Non-equilibrium Coulomb effects in resonant tunnelling through deep impurity states are analyzed. It is shown that Coulomb vertex… Expand The full metric describing a charged, magnetized generalization of the Tomimatsu-Sato (TS) δ = 2 solution is presented in a… Expand The Painlevé test is a widely applied and quite successful technique to investigate the integrability  of nonlinear ODEs and… Expand Recent progress in understanding the structure of cosmological singularities is reviewed. The well-known picture due to Belinskii… Expand Collisionless regime kinetic models for coherent nonlinear Alfven wave dynamics are studied using fluid moment equations with an… Expand Analytic continuation of quantum statistical physics from imaginary to real time is analyzed. Adiabatic vanishing of interactions… Expand Dans la partie UVB de spectre solaire (290 - 315 nm), on attribue l'efficacite maximale des effets photobiologiques a des… Expand