If we drop money, we are usually very sad if the money is big. But for example, if we drop 310 dollars, we can… — Kato Copy Share Image
It never happens that, when we go home and open the refrigerator, we see all infinitely many prime numbers there. — Kato Copy Share Image
I'm a young guy called 'commutative ring', but I was originally 'the ring of continuous functions on a compact Hausdorff space'. Now I am… — Kato Copy Share Image
The prime ideal is a princess of the world of ideals. Her father is the prince 'Point' in the world of geometry. Her mother… — Kato Copy Share Image
