Supernovae: An example of complexity in the physics of compressible fluids Yves Pomeau, Martine Le Berre, Pierre-Henri Chavanis and Bruno Denet Eur. Phys. J. E, 37 4 (2014) 26 Published online: 25 April 2014 DOI: 10.1140/epje/i2014-14026-1