Inverse problems for two by two reaction-diffusion system using a   Carleman estimate with one observation
  For a two by two reaction-diffusion system on a bounded domain we give a simultaneous stability result for one coefficient and for the initial conditions. The key ingredient is a global Carleman-type estimate with a single observation acting on a subdomain. 
Michel Cristofol (LATP), Patricia Gaitan (LATP), Hichem Ramoul (CUK)