Pot-pourri in mathematics

• Articles on higher-level mathematics.
  These articles are written in English. Although most of them contain new findings by myself, do not regard them as research papers !, because they are written mainly for higher-level mathematics students, not for professional mathematicians.
• Lecture notes on elementary mathematics.
  These notes are written in Japanese and mainly used in my undergraduate cource lectures.

• My name on net is fractaro.
  Here "frac" comes from my first (in younger days) research area "fractal", and "taro" is a most common lastname in Japan, such as Tom or John in english countries.
• My research area is Stochastic Geometry and/or Geometric Probability.
  About research papers written by me, please consult, for example, MathSci Database.
• I am very glad if you are interested in contents of my homepage and send your opinions to me (isokawa@edu.kagoshima-u.ac.jp).