Total Time Derivatives, Again

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Scientific Paper
Title Total Time Derivatives, Again
Author(s) Thomas E Phipps
Keywords {{{keywords}}}
Published 2004
Journal Galilean Electrodynamics
Volume 15
Number 4
Pages 77-80


Treatments of the invariant total time derivative by Mocanu [4] and by Post [3] are compared and found to be in substantial agreement, despite their different mathematical appearances. It is argued that the line integral approach is better adapted to electrodynamics and the surface integral approach to hydrodynamics. The line integral seems to yield a physically satisfactory invariant form of the electrodynamic force law based on the total time derivative.