Showing items with similar title or keywords.

• Regularization and finite element approximation of the wave equation with Dirichlet boundary data 

  Lasiecka, I.; Sokołowski, J.; Neittaanmäki, Pekka (Polish Academy of Sciences, Institute of Mathematics, 1990)

  A numerical method for solving the wave equation with nonhomogenuous, nonsmooth Dirichlet boundary condition is proposed. Convergence of the method is proved and some erràr estimates are derived [L-S-2]. The method ...

• Finite element approximation for a div-rot system with mixed boundary conditions in non-smooth plane domains 

  Křížek, Michal; Neittaanmäki, Pekka (Československá akademie věd. Matematický ústav., 1984)

  The authors examine a finite element method for the numerical approximation of the solution to a div-rot system with mixed boundary conditions in bounded plane domains with piecewise smooth boundary. The solvability of the ...

• On the convergence of the finite element approximation of eigenfrequencies and eigenvectors to Maxwell's boundary value problem 

  Neittaanmäki, Pekka; Picard, Rainer (Suomalainen tiedeakatemia, 1981)

• Finite element approximation of vector fields given by curl and divergence 

  Neittaanmäki, Pekka; Saranen, Jukka (Wiley, 1981)

• On Finite Element Approximation of the Gradient for Solution of Poisson Equation 

  Neittaanmäki, Pekka; Saranen, Jukka (Springer, 1981)

  A nonconforming mixed finite element method is presented for approximation of ∇w with Δw=f,w| r =0. Convergence of the order∥∇w−uh∥0,Ω=O(h2) is proved, when linear finite elements are used. Only the standard regularity ...