A regularity criterion for the three-dimensional MHD equations in terms of one directional derivative of the pressure

In this work, we will establish a sufficient condition for the regularity criterion to the 3D MHD equations in terms of one directional derivative of the pressure. More precisely, we prove that if ∂π∂x3(x,t)∈L21−r(0,T;M⋅2,3r(R3))    for  0