OBSTRUCTION THEORY FOR NORMAL ALEKSANDROV-CECH COHOMOLOGIES AND HOPF GENERALIZED CLASSIFICATION THEOREMS

摘要

The homology dimension theory of compacts appeared at the end of the 1920s-beginning of the 1930s in the works of P. S. Aleksandrov [17]. Constructing this theory was the first realization of Aleksandrov's ideas about the internal unity of all of topology