朱中坚，温州大学

Unstable homotopy groups of indecomposable A_3^2-complexes

In this talk, I will introduce the methods for calculating the unstable homotopy groups of finite CW-complexes which builds on works of the relative James construction initiated by B. Gray in 1973 and further developed by Yang, Mukai and Wu recently. Then I will introduce our works of using these methods to calculate the unstable homotopy groups of indecomposable A_n^2-complexes, which are elementary indecompsable homotopy type classified by by Chang in the 1950s.