A Mathematical Olympiad Companion ((link)) -

For a student venturing into the world of mathematical Olympiads, the journey often begins with a mix of exhilaration and terror. Problems that ask for the smallest possible value of a complex expression, proofs about the infinity of primes in certain arithmetic progressions, or geometry puzzles requiring a single, elegant auxiliary line—these are not the math of routine classroom drills. This is contest math, a realm where creativity trumps memorization, and insight is the ultimate currency.

Ultimately, a Mathematical Olympiad Companion is a promise: You do not have to reinvent every wheel. Others have walked this path. Here are their maps, their warnings, and their moments of sudden clarity. Now, go find your own. a mathematical olympiad companion