Weakly Mahlo cardinal
= Weakly Mahlo cardinal
A <weakly inaccessible cardinal> $\kappa$ is weakly Mahlo if $\{\alpha<\kappa:\alpha=\operatorname{cf}(\alpha)\}$ is a <stationary set>. Intersecting this set with the <club set> of uncountable <limit cardinals> shows that the weakly inaccessible cardinals below $\kappa$ are stationary, hence unbounded.