“…The analysis [40,41,56,2,44,1] and the development of numerical methods [37,33,54,62,42,13,31,51,47,34,30,50,48,16,19,17,15,32,10,28,39,20,11,21] for the passage from compressible to incompressible gas dynamics has been and is still a very active field of research. The compressible Euler equations which describe conservation of density, momentum and energy in a fluid flow become stiff when the Mach number tends to zero.…”