Differential Geometry From A Singularity Theory Viewpoint - Izumiya, Shyuichi (Hokkaido Univ, Japan) a Romero Fuster, Maria Del Carmen (Univ De Valencia, Spain) a Ruas, Maria Aparecida Soares (Univ De Sao Paulo, Brazil) a Tari, Farid (Univ De Sao Paulo, Brazil)