In the standard models of North-South technological-knowledge diffusion, the larger the initial technological-knowledge gap between countries, the greater the Southern catching up. However, this result does not adjust well to Southern reality as a whole. The purpose of this paper is to...

Model of laminated wave turbulence allows to study statistical and discrete layers of turbulence in the frame of the same model. Statistical layer is described by Zakharov–Kolmogorov energy spectra in the case of irrational enough dispersion function. Discrete layer is covered by some...

In the standard models of North-South technological-knowledge diffusion, the larger the initial technological-knowledge gap between countries is, the higher the Southern catching up. However, this result does not adjust well to Southern reality as a whole. The purpose of this paper is to...

Input-Output models of various types of prices. Prices are derived as characteristic vectors of certain kinds of matrices and price parameters as their characteristic roots. The most general are the three-channel prices that are characteristic vectors of the linear combination of matrices of the...

We discuss the time evolution of quotation of stocks and commodities and show that they form an Ising chain. We show that transaction costs induce arbitrage risk that is usually neglected. The full analysis of the portfolio theory is computationally complex but the latest development in quantum...

Large-scale air pollution models can successfully be used in different environmental studies. These models are described mathematically by systems of partial differential equations. Splitting procedures followed by discretization of the spatial derivatives lead to several large systems of...

In this paper a second degree iterative Monte Carlo method for solving systems of linear algebraic equations and matrix inversion is presented. Comparisons are made with iterative Monte Carlo methods with degree one. It is shown that the mean value of the number of chains N, and the chain length...