Carlo Frabetti

Although 2023 doesn't seem like a very interesting number, there are actually no boring numbers, just dull observers.

The Indian mathematician Narayana Pandita discovered the Fibonacci sequence independently of the Italian mathematician

Traversals on a grid have numerous applications in combinatorics

Delannoy paths on a grid and Motzkin chords on a circle are numerically related

Binary trees and “monotone” paths that, despite their name, lead to very interesting results

Catalan numbers appear in numerous combinatorial problems and can be defined in different ways.

Wooden tablets with geometric riddles were placed in Japanese temples as votive offerings.

The great Greek mathematician Apollonius of Perga anticipated fractals by more than two thousand years.

Ian Stewart's books include surprising revelations about the properties of some numbers