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math-ph2019
The Maxwell-Volterra reciprocity law in electrodynamics
Giovanni Cimatti
Use is made of the theory of elliptic equations with measures data to prove the Maxwell-Volterra reciprocity law. A simple one-dimensional example is also given.
math-ph2019
An hyperbolic system of P.D.E. relevant in general relativity
Giovanni Cimatti
Assuming as starting point the validity of the Einstein-Rosen metric, we study the hyperbolic system of P.D.E. to which the Einstein's field's equations can be reduced. We prove us…