TY - JOUR AU - Azagra Rueda, Daniel PY - 1997 SN - 0039-3223 UR - https://hdl.handle.net/20.500.14352/57010 T2 - Studia Mathematica AB - We prove that for every infinite-dimensional Banach space X with a Frechet differentiable norm, the sphere S-X is diffeomorphic to each closed hyperplane in X. We also prove that every infinite-dimensional Banach space Y having a (not necessarily... LA - eng M2 - 179 PB - Polish Acad Sciencies Inst Mathematics KW - Infinite-dimensional Banach space KW - Unit sphere KW - Hyperplane KW - Diffeomorphism TI - Diffeomorphisms between spheres and hyperplanes in infinite-dimensional Banach spaces TY - journal article VL - 125 ER -