Abstract
We present new interior regularity criteria for suitable weak solutions of the magnetohydrodynamic equations in dimension three: a suitable weak solution is regular near an interior point z if the scaled L x , t p , q -norm of the velocity with 1 ⩽ 3 / p + 2 / q ⩽ 2 , 1 ⩽ q ⩽ ∞ is sufficiently small near z and if the scaled L x , t l , m -norm of the magnetic field with 1 ⩽ 3 / l + 2 / m ⩽ 2 , 1 ⩽ m ⩽ ∞ is bounded near z. Similar results are also obtained for the vorticity and for the gradient of the vorticity. Furthermore, with the aid of the regularity criteria, we exhibit some regularity conditions involving pressure for weak solutions of the magnetohydrodynamic equations.
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