I just read about Grigori Perelman, a Russian mathematician who is truly unique. Stories about him often fascinate people, especially because of his very different life choices from other scientists.

So Grigori Perelman was born in 1966 in Leningrad and successfully proved the Poincaré conjecture — a problem that had remained unsolved for nearly 100 years. This is no small feat in the world of mathematics. His proof demonstrated how a closed three-dimensional space without holes is essentially equivalent to a three-dimensional sphere — a concept quite complex but important in topology.

What’s interesting is how he approached the proof process. Perelman did not hold grand press conferences or spectacular presentations. He simply posted his work on arXiv between 2002-2003, an open server for mathematicians, and let the scientific community verify his proof themselves. The verification took years due to its complexity, but it was ultimately confirmed to be correct.

Because of this achievement, Grigori Perelman received the Fields Medal in 2006 and the Millennium Prize from the Clay Mathematics Institute in 2010. But here’s an interesting twist — he declined both awards. You can imagine how unusual this is in the academic world.

After around 2005-2006, Perelman completely withdrew from academic life. He no longer attended conferences, published new work, or practically worked at any university. Now he lives very privately in Saint Petersburg, rarely seen in public, unmarried, living with his mother in a modest apartment.

According to circulating reports, his lifestyle is very minimalist — he shops at regular grocery stores, buys cheap products, and pays in cash. He almost never gives interviews to journalists. Perelman explained his decision to leave academia by criticizing how the mathematics community is organized and because he was not interested in fame or material wealth.

There is a quote from Grigori Perelman that is often cited: “Why do I need awards and money if I know how to organize the world?” This statement truly summarizes his life philosophy. He chooses to focus on pure intellectual work rather than social recognition or financial gain. Perelman’s story serves as a reminder that some people are genuinely motivated solely by the pursuit of knowledge, not external things.