Here is the layman's article of the paper linked: https://www.popsci.com/science/algebra-oldest-problem-solved/ https://www.popsci.com/science/algebra-oldest-pr

Here is the layman's article of the paper linked: https://www.popsci.com/science/algebra-oldest-problem-solved/ https://www.popsci.com/science/algebra-oldest-problem-solved... On the Catalan number wikipedia page, scroll down to "A convex polygon with n + 2 sides..." to see the polygon dissection: https://en.wikipedia.org/wiki/Catalan_number https://en.wikipedia.org/wiki/Catalan_number