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math.OA2022
Coarse embeddings at infinity and generalized expanders at infinity
Jintao Deng, Liang Guo, Qin Wang +1
We introduce a notion of coarse embedding at infinity into Hilbert space for metric spaces, which is a weakening of the notion of fibred coarse embedding and a far generalization o…
math.OA2021
K-theory of the maximal and reduced Roe algebras of metric spaces with A-by-CE coarse fibrations
Liang Guo, Zheng Luo, Qin Wang +1
Let be a discrete metric space with bounded geometry. We show that if admits an "A-by-CE coarse fibration", then the canonical quotient map fro…