2-local unstable homotopy groups of indecomposable ${\mathbf{A}}_3^2$ -complexes

Abstract

In this paper, we calculate the 2-local unstable homotopy groups of indecomposable ${\mathbf{A}}_3^2$-complexes. The main technique used is analysing the homotopy property of $J(X,A)$, defined by B. Gray for a CW-pair $(X,A)$, which is homotopy equivalent to the homotopy fibre of the pinch map $X\cup CA\to \Sigma A$.