Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 38 4 2012 12 15 Multiple point of self-transverse immesions of certain manifolds869 882 en Mohammad Ali Asadi-Golmankhaneh Assistant Prof. Mathematics Department, Urmia University 2009 08 27 Immersion Hurewicz homomorphism spherical classes Stiefel-Whitney number