Volume: 23, Issue: 1 (February 2011) N/V-LIMIT FOR LANGEVIN DYNAMICS IN CONTINUUM FLORIAN CONRAD and MARTIN GROTHAUS DOI No: 10.1142/S0129055X11004229 Page: 1-51 SPECTRAL AND SCATTERING THEORY FOR THE AHARONOV–BOHM OPERATORS KONSTANTIN PANKRASHKIN and SERGE RICHARD DOI No: 10.1142/S0129055X11004205 Page: 53-81 PERTURBATION OF NEAR THRESHOLD EIGENVALUES: CROSSOVER FROM EXPONENTIAL TO NON-EXPONENT..