37 citations · 93 across the 10 of their papers we have counts for
Showing 2001Show all
3 papers · 1 filter
gr-qc2001
Computer algebra in gravity
Christian Heinicke, Friedrich W. Hehl
We survey the application of computer algebra in the context of gravitational theories. After some general remarks, we show of how to check the second Bianchi-identity by means of…
gr-qc2001
On the energy-momentum current of the electromagnetic field in a pre-metric axiomatic approach. I
Friedrich W. Hehl, Yuri N. Obukhov
We complete a metric-free axiomatic framework for electrodynamics by introducing the appropriate energy-momentum current Sigma of the electromagnetic field. We start from the Loren…
hep-th2001
The Gordon decompositions of the inertial currents of the Dirac electron correspond to a Foldy-Wouthuysen transformation
Ingo Kirsch, Lewis H. Ryder, Friedrich W. Hehl
We consider Dirac's free electron theory on the first quantized level. We decompose its canonical spin current á la Gordon and find a conserved ``Gordon spin'' current which turns…