Electron. J. Diff. Eqns., Vol. 2002(2002), No. 26, pp. 1-13.

Nonlinear Klein-Gordon equations coupled with Born-Infeld type equations

Pietro d'Avenia & Lorenzo Pisani

Abstract:
In this paper we prove the existence of infinitely many radially symmetric standing waves in equilibrium with their own electro-magnetic field. The interaction is described by means of the minimal coupling rule; on the other hand the Lagrangian density for the electro-magnetic field is the second order approximation of the Born-Infeld Lagrangian density.

Submitted November 14, 2001. Published March 4, 2002.
Math Subject Classifications: 58E15, 35J50, 35Q40, 35Q60.
Key Words: Nonlinear Klein-Gordon equation, solitary waves, electromagnetic field, variational methods.

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Pietro d'Avenia
Dipartimento Interuniversitario di Matematica
Universita degli Studi di Bari
Via Orabona, 4
70125 Bari Italy
e-mail: pdavenia@dm.uniba.it

Lorenzo Pisani
Dipartimento Interuniversitario di Matematica
Universita degli Studi di Bari
Via Orabona, 4
70125 Bari Italy
e-mail: pisani@dm.uniba.it


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