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Imaginary?

Today I was working a problem involving complex numbers in number theory. A friend, Kesavan, dropped by to chat, which I welcomed -- I...

Combinatorics is one of the four fundamental branches of Mathematics in high school competitive math. Compared with number theory,...

We have known the concept of infinity ever since we were very young. For most people, infinity would mean infinitely getting closer to...

Pythagoras once said "All is number". Well, it's true! Why does the sum of these two mysterious symbols 2 and 3 equals to 5? Well, what...