Abstract
The formulation of Maxwell's equations using exterior differentiation is compared to that involving covariant differentiation. These two formulations are known to be equivalent in a space with a Riemannian connection, and a necessary and sufficient condition is established here for this equivalence to be maintained in the case where the connection is of the most general type, namely a connection with, in general, torsion and non-metricity, in addition to curvature.

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