8 citations · 9 across the 6 of their papers we have counts for
4 papers · 1 filter
Is Electromagnetic Field Momentum Due to the Flow of Field Energy?
Oliver Davis Johns
Conservation laws that are based on the divergence of a second-rank four-tensor are fundamentally different from conservation laws based on the divergence of a four-vector. This ar…
A Spherical Version of Feynman's Static Field Momentum Example
Oliver Davis Johns
The Feynman demonstration that electromagnetic field momentum is real-even for static fields-can be made more pedagogically useful by simplifying its geometry. Instead of Feynman's…
Leibniz Equivalence, Newton Equivalence, and Substantivalism
Oliver Davis Johns
Active diffeomorphisms map a differentiable manifold to itself. They transform manifold points and objects without changing the system of local coordinates used to represent those…
Validity of the Einstein Hole Argument
Oliver Davis Johns
Arguing from his "hole" thought experiment, Einstein became convinced that, in cases in which the energy-momentum-tensor source vanishes in a spacetime hole, a solution to his gene…