Recently, I was reading about Grigori Perelman and honestly, his story is fascinating for reasons beyond mathematics. This guy solved the Poincaré conjecture, a problem that no one had been able to prove for nearly 100 years. To understand the magnitude: he is the only one of the seven Millennium Prize Problems that has been solved so far.

The interesting part is not just that Perelman achieved it, but how he did it. He published his proof directly on arXiv between 2002 and 2003, without noisy conferences, press releases, or the media circus that scientists usually create. He simply uploaded his work online and let the mathematical community verify it. The proof used Ricci flow methods and geometric topology, quite complex, so mathematicians took years to confirm it was correct.

In 2006, he received the Fields Medal, the most prestigious award in mathematics. Then in 2010, he was offered the Clay Mathematics Institute prize with a million dollars. And you know what? He rejected everything. The awards, the money, the fame, all of it.

To understand what he solved: the Poincaré conjecture basically states that if you have a closed three-dimensional space without holes, then it is equivalent to a sphere. If you think simply: no holes is a sphere, holes are a donut. It sounds easy explained like that, but the mathematical proof is a completely different story.

What I find most striking about Grigori Perelman is his life after solving the problem. He distanced himself from academia around 2005-2006 and practically disappeared. He lives in Saint Petersburg, rarely goes outside, doesn’t give interviews. There are videos of him in supermarkets buying cheap things and paying with cash. He lives with his mother in a modest apartment, without pretensions of material comfort.

When asked why he rejected the awards and distanced himself from everything, Perelman responded with something that perfectly summarizes his philosophy: why does he need awards and money if he already knows how the world works? Pure critique of how the scientific community is structured, of ego and obsession with fame. That guy literally solved one of the greatest mathematical mysteries and decided that was enough. No need for external validation or media recognition. Quite different from what we’re used to seeing today.