“God geometrizes continually”, Plato (427-347 B.C.).
Phi (Φ,φ) –the golden number or Fibonacci’s number– is a very familiar concept, and one that has been studied by mathematicians of all ages. Nor is it unknown to lovers of art, biology, architecture, music, botany and finance, for example. You’re very likely to have come across it in any of these disciplines. Does this mean it’s possible to find a numerical translation for everything we see, hear or build around us? Perhaps the closest answer to this question is the phrase by Plato that opens this article.
But let’s take a closer look at a mathematical phenomenon that has attracted the attention of thinkers from all disciplines and periods since it was discovered: the golden ratio or the divine proportion. Before we start, we must go all the way back to the story of the mathematician Leornardo Bigollo (Leonardo Pisano or “the one from Pisa”), Fibonacci.”