Equivalence of two independent calculations of the higher order guiding center Lagrangian
Abstract
The difference between the guiding center phase-space Lagrangians derived in [J.W. Burby, J. Squire, and H. Qin, Phys. Plasmas 20, 072105 (2013)] and [F.I. Parra, and I. Calvo, Plasma Phys. Control. Fusion 53, 045001 (2011)] is due to a different definition of the guiding center coordinates. In this brief communication the difference between the guiding center coordinates is calculated explicitly.
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