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- W2039968591 abstract "We establish existence of weak solutions to the equilibrium equations of magnetohydrodynamics with prescribed topology. This is carried out in two settings. In the first we consider the variational problem of minimizing total energy in a torus under the assumption of axisymmetry, and prescription of mass and flux profiles. Existence of weak solutions implies that the prescription of topology is a natural constraint. Both the compressible and incompressible cases are considered. In the second setting we adapt examples of B. C. Low and R. Wolfson [13] and J. J. Aly and T. Amari [1, 2, 3] associated with Parker's explanation of the extreme heating of the solar corona and other solar phenomena. Existence of solutions with fixed topology is a first crucial step in rigorously examining the relationship between topology and the existence of current sheets. We use a decomposition introduced in [8, 9, 11] that captures much of the topology of level sets for certain classes of Sobolev functions. This decomposition is preserved under weak limits and so is useful for prescribing topological constraints. The approach is especially suited to the use of domain deformations. © 2000 John Wiley & Sons, Inc." @default.
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- W2039968591 date "2000-01-01" @default.
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- W2039968591 title "Two-dimensional magnetohydrodynamic equilibria with prescribed topology" @default.
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- W2039968591 doi "https://doi.org/10.1002/1097-0312(200009)53:9<1177::aid-cpa5>3.0.co;2-a" @default.
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