Uniqueness for an inverse problem for a semilinear time-fractional   diffusion equation
  An inverse problem to determine a space-dependent factor in a semilinear time-fractional diffusion equation is considered. Additional data are given in the form of an integral with the Borel measure over the time. Uniqueness of the solution of the inverse problem is studied. The method uses a positivity principle of the corresponding differential equation that is also proved in the paper. 
Jaan Janno and Kairi Kasemets
math.AP