  In connection to a review of the writings on Galois Theory of the Portuguese
mathematician Aureliano Mira Fernandes at turn of the XXth century a brief
narrative is presented on how the group theory concepts discovered by Galois
are connected to previous work that took centuries to evolve, and how fast they
changed the landscape of theoretical and applied mathematics and physics since
its publication.
  From the conference "Mira Fernandes and his age - An historical Conference in
honour of Aureliano de Mira Fernandes (1884-1958)", IST Lisbon, June 2009
