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Lifespan of the non-resistive Hall-MHD system with small magnetic gradient
AIMS Mathematics 2026, 11(2): 4966-4984
Published: 27 February 2026
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In this paper, we studied the non-resistive axially symmetric Hall-Magnetohydrodynamics (MHD) system. We showed that the lifespan of their strong solutions can be arbitrarily large if their initial magnetic gradient was small enough. Precise lifespan lower bounds for both viscid and inviscid cases were given.

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