文摘
Let \(G\) be a virtually special group. Then the residual finiteness growth of \(G\) is at most linear. This result cannot be found by embedding \(G\) into a special linear group. Indeed, the special linear group \({{\mathrm{SL}}}_k(\mathbb {Z})\) , for \(k > 2\) , has residual finiteness growth \(n^{k-1}\) .