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Solutions of Eq. (4) in space for the three different values (solid lines) and three possible routes (dashed and dotted lines) to take a configuration with positive curvature and current density into the line .
Magnetic surfaces for and (a), (b), and (c), all with positive.
Gaussian curvature versus on-axis toroidal current density (a); toroidal current density (black) and plasma pressure (gray), along the midplane (b) and (c), for (dashed line, ), 2.335 (solid line, ), and (dotted line, ).
Magnetic surfaces corresponding to (a), 2.335 (b), and (c).
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