ON THE KOSCHORKE NORMAL BORDISM SEQUENCE

摘要

In this paper we investigate in detail the Koschorke normal bordism sequence which is very important in application, give a general method by which one may determine the group structures of Ω₁（X, ω） and Ω₂（X, φ） appearing in the sequence and compute Ω_i（X×BO（2）, φ×Γ）, i=1, 2.