Then , we consider the following Cauchy problems for the MHD equations(m = 2):where u = u(x,t) , B = B(x,t) , p = p(x,t) , a , b have the same meanings as above.

• 考虑如下MHD方程组(m=2)的Cauchy问题:这里 u=u(x,t),B=B(x,t),p=p(x,t)分别表示流体的速度场,磁场以及压力。 a,b表示给定的初值,并且满足?·a=0,?·b=0。