This page is now under construction.
I will collect several mathematical wits here. Some pedantic
people must humph these, since these are not modern mathematics.
If you love longing old mathematics, you must enjoy my collections.
Friday afternoon mathematics.
In order to enjoy mathemusement, we encounter some problem
what kind of knowledge of mathematics is required. To understand
some mathemusement, an elementary arithmetics would be enough.
Some mathemusement requires us to have university level of mathematics.
In such varieties, I have chosen some category of the topics
which freely contain any level of mathematics but, on the other hand,
each topic has an easy part in time
such that a part of each topic is enough understandable by
elementary arithmetics (highschool arithmetics).
I call such category of mathemusement specially "friday afternoon
mathematics." (The asterisks indicate that the problems contain
my original solutions.)
- Magic Cubes & N-adic
- Four "4"s
- Discontinuous functions(equations)
- Plane figure equations
- Domain-size invariant integral
- AWK script that calculates magic square of any order
- Reverse Polynomial
- Numbers equal their squares.
- Irreducible-parameter invariant function
- p-adic algebraic field and base-p digit systems for programmers
- Pi Poetry
- How to guess the day of the week for your friend's birthday?
- Magic Cubes of prime orders.
- Hyper Magic Cubes.
- Function Calculator
- Komachi reckoning
- Resistive networks
- Cyclic logarithm
- Dice Origami
- Fake Dice
- Digit-matrix decompositions of N-adic magic squares
- 2D digit-tiling
Magic Cubes and Magic Squares
Here are my several works around the magic of the numbers.
- Magic Squares
- Kenichi Numakura's link page
The page is made by F. Poyo, c/o
Yoshi Tamori (my keeper)
Please let me hear you by e-mailing to