TY - JOUR AU - Shyuichi Izumiya AU - Kentaro Saji TI - The mandala of Legendrian dualities for pseudo-spheres in Lorentz-Minkowski space and ``flat'' spacelike surfaces JO - Journal of Singularities PY - 2010 SP - 92 EP - 127 VL - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.5427/jsing.2010.2g/ DO - 10.5427/jsing.2010.2g ID - 10_5427_jsing_2010_2g ER -