TY - JOUR AU - M. Elin AU - M. Levenshtein AU - S. Reich AU - D. Shoikhet TI - Some inequalities for the horosphere function and hyperbolically nonexpansive mappings on the Hilbert ball JO - Contemporary Mathematics. Fundamental Directions PY - 2012 SP - 75 EP - 93 VL - 45 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2012_45_a5/ LA - ru ID - CMFD_2012_45_a5 ER -