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 - <p style="text-align: justify;">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.</p>