The coarse Novikov conjecture for extensions of coarsely embeddable groups

Qin Wang, Yazhou Zhang

Let $(1\to N_n\to G_n\to Q_n\to 1{)}_{n\in \mathbb{N}}$ be a sequence of extensions of countable discrete groups. Endow $(G_n{)}_{n\in \mathbb{N}}$ with metrics associated to proper l…