VEQ introduces a compact parametric Grad-Shafranov solver using MXH harmonics and Chebyshev coefficients that maps six input routes to a single variational residual operator and achieves millisecond solves with 10^-3 shape errors on G-EQDSK test cases.
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Metriplectic systems converge to entropy extrema at fixed Hamiltonian under stated conditions; a Landau-inspired class reduces the check to two simpler conditions for use in equilibrium relaxation schemes.
Pfirsch-Schlüter current localizes within a stellarator half-period when dℓ/B is uniform across field lines on a surface, equivalent within 0.1% to uniform ℓ_p/2 travel distance.
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VEQ: a fast parametric Grad--Shafranov solver for fixed-boundary tokamak equilibria with flexible source profiles
VEQ introduces a compact parametric Grad-Shafranov solver using MXH harmonics and Chebyshev coefficients that maps six input routes to a single variational residual operator and achieves millisecond solves with 10^-3 shape errors on G-EQDSK test cases.
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Pfirsch-Schl\"uter Current
Pfirsch-Schlüter current localizes within a stellarator half-period when dℓ/B is uniform across field lines on a surface, equivalent within 0.1% to uniform ℓ_p/2 travel distance.