3 papers
physics.class-ph2008
Premetric electrodynamics
Bernard Jancewicz
Classical electrodynamics can be divided into two parts. In the first one, with the use of a plenty of directed quantities, namely multivectors and differential forms, no scalar pr…
physics.class-ph2005
Plane electromagnetic wave in PEMC
Bernard Jancewicz
Plane electromagnetic wave propagating in perfect electromagnetic conductor (PEMC) is considered. Its wave number has no connection with the frequency. An interface is introduced b…
gr-qc1998
Answer to Question 55: Are there pictorial examples that distinguish covariant and contravariant vectors?
Bernard Jancewicz
We present pictorial means of distinguishing contravariant vectors (or simply vectors) from covariant vectors (or linear forms). When one depicts vector as the directed segment, th…