Vladimir Tenev

He would travel around the world and basically stay at his friends places for a couple of weeks.

And his friends were all mathematicians and he would work on their math problems with them.

So he was kind of like a traveling mathematician.

He was so prolific that

There's a thing called an Erdős number, which is basically your Erdős number is zero.

Well, Paul Erdős' number is zero.

If you've co-authored a paper with him, it's one.

If you've co-authored a paper with someone that's co-authored a paper with Paul Erdős, it's two and so on.

So it's kind of like the Kevin Bacon number.

How many degrees away from Kevin Bacon?

If you're in a movie with him, your Bacon number is one.

Funny enough, there's also a thing called an Erdős-Bacon number where you add the two.

And there is someone with an Erdős-Bacon number of three.

So they co-authored a paper with Paul Erdős and they were in Goodwill hunting.

So they were like two degrees away from Kevin Bacon.

Anyway, over history, there are about 1100 Erdős problems that were collected from his travels.

And, you know, there's a guy that made a website collecting them and everything.

About half of them are solved already.

Half of them are unsolved.

And Aristotle, our model, either solved or assisted in the solving and verifying of something like 11 of them.