Homotopy classification of $$\textit{PD}_4$$ PD 4 -complexes relative an order relation Academic Article uri icon

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abstract

  • We define an order relation among oriented $PD_4$-complexes. We show that with respect to this relation, two $PD_4$-complexes over the same complex are homotopy equivalent if and only if there is an isometry between the second homology groups. We also consider minimal objects of this relation.

publication date

  • June 2015