Optimal $L^{\infty }(L^2)$ and $L^1(L^2)$ a posteriori error estimates for the fully discrete approximations of time fractional parabolic differential equations

Jiliang Cao, Wansheng Wang, Aiguo Xiao

We derive optimal order a posteriori error estimates in the $L^{\infty }(L^2)$ and $L^1(L^2)$-norms for the fully discrete approximations of time fractional parabolic differential equ…