Question: Given a point cloud, X = { v 1 , v 2 , v 3 , v 4 , v 5 } , and the

Given a point cloud, X ={v1, v2, v3, v4, v5}, and the collection of open subsets, U ={{},{v1, v2, v3, v4, v5},{v1, v3},{v2, v4},{v4, v5},{v5}}. Is (X, U) a valid topological space?
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