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The paper concerns itself with the parallel algorithms based on collocation block methods and allows solving the Cauchy problem for systems of ordinary differential equations at points forming a block simultaneously. For all the developed methods the conditions for stability and order of accuracy are determined, the convergence is proven. The structure of the developed methods allows constructing algorithms for automatic integration step control, which is especially important in the simulation of objects described by stiff or ill-conditioned systems of equations. For simulation of linear...

The work is devoted to the construction of efficient parallel algorithms of the integration step control in for simulation of dynamic objects. To select the optimum step size the paper proposes several parallel algorithms that are based on well-known, specially restructured methods of solving systems of ordinary differential equations. For these purposes, the parallel nested methods, explicit and implicit extrapolation schemes of variable order are used. As a criterion for the selection of the numerical scheme the inequalities which control accuracy and stability are used. When solving stiff...