Joitakin piirtämiäni kuvia. Some pictures, which I have drawn.
Methods: TikZ, numerical software etc.
Haluan kiittää Prof. Gaetano Zanghiratia (Department of Mathematics and Computer Science, University of Ferrara, Italy) hänen kauniista materiaaleistaan, joista olen oppinut monia asioita koskien TikZiä ja Beameria.
I wish to thank Prof. Gaetano Zanghirati (Department of Mathematics and Computer Science, University of Ferrara, Italy) for his beautiful materials, which taught me many things about TikZ and Beamer.