The Controllability of Fokker--Planck Equations with Reflecting Boundary Conditions and Controllers in Diffusion Term

One proves the exact controllability of the Fokker--Planck equation $\rho_t-\frac12\ \Delta(u\rho)-{div}(b\rho)=0,$ $\rho(0)=\rho_0,$ $\rho(T)=\rho_1,$ on a bounded domain $\mathcal{O}$ with reflec...