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• Instruction-based clinical eye-tracking study on the visual interpretation of divergence : how do students look at vector field plots? 

  Klein, P.; Viiri, Jouni; Mozaffari, S.; Dengel, A.; Kuhn, J. (American Physical Society, 2018)

  Relating mathematical concepts to graphical representations is a challenging task for students. In this paper, we introduce two visual strategies to qualitatively interpret the divergence of graphical vector field ...

• Internal FE approximation of spaces of divergence‐free functions in three‐dimensional domains 

  Křižek, Michal; Neittaanmäki, Pekka (Wiley, 1986)

  The space of divergence‐free vector functions with vanishing normal flux on the boundary is approximated by subspaces of finite elements having the same property. An easy way of generating basis functions in these subspaces ...

• Effective axial-vector strength within proton-neutron deformed quasiparticle random-phase approximation 

  Delion, D. S.; Dumitrescu, A.; Suhonen, J. (American Physical Society, 2019)

  We use the available experimental Gamow-Teller β− and β+/EC (electron-capture) decay rates between 0+ and 1+ ground states in neighboring even-even and odd-odd nuclei, combined with 2νββ half-lives, to analyze the influence ...

• 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 ...