Dolbeault J., Esteban Maria J., Sere E.
On the eigenvalues of operators with gaps. Application to Dirac operators II.
(448K, Postscript)

ABSTRACT.  This paper is an improved version of mp-arc 99-199.  In the present version,
we introduce a new abstract continuation principle. With this principle, the
study of the Dirac operator with Coulomb-like potential is greatly simplified
and additional results are easily obtained.