
 [No title] (Site not responding. Last check: 20070907) 
  The exponential, nonisotropic bounds of Agmon for eigenfunctions corresponding to eigenvalues below the bottom of the essential spectrum are developed, beginning with a discussion of the Agmon metric. 
  The analytic method of Combes and Thomas, with improvements due to Barbaroux, Combes, and Hislop, for proving exponential decay of the resolvent, at energies outside of the spectrum of the operator and localized between two disjoint regions, is presented in detail. 
  The results are applied to prove the exponential decay of eigenfunctions corresponding to isolated eigenvalues of SchrÃ¶dinger and Dirac operators. 
 www.matem.unam.mx /EMIS/journals/EJDE/confproc/04/h2/abstr.asc (182 words) 
