The analytic properties of the elastic hadron scattering amplitude are
examined in the impact parameter representation at high energies. Different
unitarization procedures and the corresponding non-linear equations are
presented. Several unitarisation schemes are presented. They lead to almost
identical results at the LHC.Comment: 7 pages, needs class cjpsuppl.cls (provided), to appear in the
proceedings of the Advanced Studies Institute on Symmetries and Spin,
SPIN-Praha-2006, Czech. J. Phys. 56 (2006
