Anton Kapustin is a person who is known for being very smart in the field of mathematics. He has studied a lot and learned a lot about how numbers work and how we can use them to solve problems in the world around us.
Imagine you have a bunch of blocks with numbers on them, and you want to put them in order from smallest to biggest. Anton knows how to do that really well! He can also use the numbers to solve more complicated problems, like figuring out how to build strong bridges or predicting how a virus might spread.
Anton has worked really hard to be good at math, just like how you have to practice and learn to get better at things like riding a bike or drawing a picture. And because of all his hard work and intelligence, he has become famous in the world of math.