摘要
This is a brief account of a study leading to the following result: Theorem. For any finite polyhedron K with curvature【0, Wh （π<sub>1</sub>k×z<sup>i</sup>）=0, i≥0. The study is related to the following theories: S-Cobordism Theorem. Let W be h-cobordism over M<sup>n</sup>, n≥5. Then W is a
