👉 In mathematics, a weakly closed set is a subset of a topological space that is not closed under any finite intersections. This means that if one considers all possible finite unions of elements in the set, they will always be disjoint from each other. For example: - The set {1, 2} is a weakly closed set because it is closed under the union of all subsets of size 3: {1}, {2}, and {1, 2}. - The set