Weighted estimates for time-fractional parabolic equations with VMO coefficients

This paper is devoted to the weighted estimates and the solvability of time-fractional parabolic equations. The leading coefficients $a^{ij}(t,x)$ are assumed to have small mean oscillations in $(t,x)$ locally, in both non-divergence and divergence forms, in the whole space. By employing appropriate odd and even extensions along with suitable boundary value conditions, we derive the corresponding results for the half-space. The proofs rely on the application of the Fefferman-Stein theorem and the Hardy-Littlewood maximal function theorem in the context of weighted mixed spaces.