Stencil calculations and matrix-free Krylov subspace solvers represent important components of many scientific computing applications. In these solvers, stencil applications are often the dominant… (More)

This paper presents a new fast met hod for polygonization of implicit surf aces. Our method put emphasis on shape of triangles generated and on the polygonization sp eed. The main advantages of the… (More)

We propose an algorithm for the efficient parallel implementation of elastoplastic problems with hardening based on the so-called TFETI (Total Finite Element Tearing and Interconnecting) domain… (More)

PERMON makes use of theoretical results in quadratic programming algorithms and domain decomposition methods. It is built on top of the PETSc framework for numerical computations. This paper… (More)

The paper is devoted to the numerical solution of elastoplastic constitutive initial value problems. An improved form of the implicit return-mapping scheme for nonsmooth yield surfaces is proposed… (More)

This paper presents an adaptive approach for polygonization of implicit surfaces. The algorithm generates a well-shaped triangular mesh with respect to a given approximation error. The error is… (More)

The paper is devoted to the numerical solution of elastoplastic constitutive initial value problems. An improved form of the implicit return-mapping scheme for nonsmooth plastic potentials is… (More)

In this paper, we place some left restrictions on derivations in CD grammar systems with phrase-structure grammars, controlled by the regular languages. The first restriction requires that every… (More)