# Which math equation best describes your personality

## Freistetter formula world: The most beautiful formula in the world

A year ago I wrote the first text for this column and since then I have searched the world of mathematical formulas for exciting stories every week. I've presented equations that come from physics, from pure mathematics, and from astronomy. There were biological and chemical formulas, and I've always tried to avoid the overly obvious and familiar equations. Now, on the one-year birthday of this column, there is no other way. I would like to deal with a formula that, if you ask mathematicians about the "most beautiful formula", always comes in first place. And rightly so. It's also my absolute favorite formula:

This is the famous "Eulerian identity". It combines three of the most important constants in mathematics and physics: The circle number π, the imaginary uniti and the base of the natural logarithm, Euler's numbere. Sometimes you can also find the formula in the form e + 1 = 0 in order to also include the two constants 0 and 1. 