<p>We are concerned with the estimate of singular set of weak solution to Magneto-hydrodynamical (MHD) equations. First, we show that if the pressure <i>P</i> associated to a Leray-Hopf weak solution (<i>u</i>,&#xa0;<i>b</i>) satisfies some additional assumptions, then there is a reduction in the Hausdorff dimension of singular set at a first potential blow up time. Next, instead of imposing the assumption on the pressure, we prove that if the initial data satisfies an extra assumption, then (<i>u</i>,&#xa0;<i>b</i>) possess finite number singular points at first potential blow up time.</p>

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The Estimate of Singular Set of Weak Solution to MHD Equations

  • Zhong Tan,
  • Jianfeng Zhou

摘要

We are concerned with the estimate of singular set of weak solution to Magneto-hydrodynamical (MHD) equations. First, we show that if the pressure P associated to a Leray-Hopf weak solution (ub) satisfies some additional assumptions, then there is a reduction in the Hausdorff dimension of singular set at a first potential blow up time. Next, instead of imposing the assumption on the pressure, we prove that if the initial data satisfies an extra assumption, then (ub) possess finite number singular points at first potential blow up time.