the gift of numbers

the mathematical fromula the professor loved

When I was in the first grade at elementary school, arithmetics was fun.
But as I went up to higer grade, it was no more fun.

At the movie the old professor's memory lasts only for eighty minutes.
The young single mother works for him to do his care.

He loves mathematics so much.
And the woman and her son make friends with him.

Mathematics is difficult but mathematical formulas are beautiful.
The professor says what is important can not be seen.
The phrase is like "Little Prince".

The original story will be translated in English.
I want to read it.