About 5 years ago, Dai, Zhou and Geng proved the following
result. If $X$ is a metric compact space and $f:X\to X$ a
Lipschitz continuous map, then the Hausdorff dimension of
$X$ is bounded from below by the topological entropy of
$f$ divided by the logarithm of its Lipschitz constant. We
show that this is a simple consequence of a 30 years old
Bowen's definition of topological entropy for noncompact
sets. Moreover, a modification of this definition provides
a new insight into the entropy of subshifts of finite
type.