Fa\`a di Bruno's note on eponymous formula, trilingual version
  About 160 years ago, the Italian mathematician Fa\`a di Bruno published two notes dealing about the now eponymous formula giving the derivative of any order of a composition of two functions. We reproduce here the two original notes, Fa\`a di Bruno (1855, 1857), written respectively in Italian and in French, and propose a translation in English. 
Julyan Arbel (Inria Grenoble Rh\^one-Alpes)
math.HO