Expanders and Property A
arXiv:1108.6232 · doi:10.2140/agt.2012.12.37
Abstract
We give a cohomological characterisation of expander graphs, and use it to give a direct proof that expander graphs do not have Yu's property A.
arXiv:1108.6232 · doi:10.2140/agt.2012.12.37
We give a cohomological characterisation of expander graphs, and use it to give a direct proof that expander graphs do not have Yu's property A.