Abstract
Our paper shows that global solutions \((u,b)\in C([0,\infty );H_{a,\sigma }^s({\mathbb {R}}^3))\) of the Magnetohydrodynamics equations present the following asymptotic behavior:
where \(a>0\), \(\sigma > 1\), \(s>1/2\) and \(s\ne 3/2\). It is important to point out that the assumption related to existence of global solutions for this same system can be made since the existence and uniqueness of local solutions were recently established; more precisely, it has been proved that there is a time \(T > 0\) such that \((u,b)\in C([0,T];H_{a,\sigma }^s({\mathbb {R}}^3))\).
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Communicated by Ansgar Jüngel.
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R. Guterres: This author was partially supported by FACEPE Grant BFP-0067-1.01/19. C. Perusato: This author was partially supported by CAPES Grant 88881.311964/2018-01.
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Guterres, R., Melo, W.G., Nunes, J. et al. Large time decay for the magnetohydrodynamics equations in Sobolev–Gevrey spaces. Monatsh Math 192, 591–613 (2020). https://doi.org/10.1007/s00605-020-01415-6
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DOI: https://doi.org/10.1007/s00605-020-01415-6