TY - JOUR T1 - Expanders, Group Extensions, Hadamard Manifolds and Certain Banach Spaces AU - Shan , Lin JO - Communications in Mathematical Research VL - 4 SP - 335 EP - 339 PY - 2019 DA - 2019/12 SN - 35 DO - http://doi.org/10.13447/j.1674-5647.2019.04.04 UR - https://global-sci.org/intro/article_detail/cmr/13559.html KW - expander, group extension, Hadamard manifold, Banach space. AB -

In this note, we prove that expanders cannot be coarsely embedded into group extensions of sequences of groups which are coarsely embeddable into Hardamad manifolds and certain Banach spaces due to the similar concentration theorems.