摘要
It is one of the important problems in algebraic topology to discuss the homotopy equivalence property of maps between two topological spaces. For the CW-complex, in 1949, J. H. C. Whitehead (Combinatorial homotopy: I, Bull. Am. Math. Soc., 55(1949), 213—245) proved a valuable result: A continuous map f:
基金
Project supported by the National Natural Science Foundation of China
