ABSTRACT

W hat are the 10 most beautiful formulas in probability?This question is not easily answered. Now, if you wantedto know what the most beautiful mathematical formula is, well, that’s another matter. Almost all mathematicians agree that this honor goes to Euler’s identity:

eipi + 1 = 0,

where e = 2.71828 . . . is the Euler number and i is the complex number

√−1. This mind-blowing equation is sometimes called

‘Gods equation’: it unites the five most important numbers from mathematics (‘the dream team of numbers’).