open set
1. Definition
Let \((X, \mathcal{T})\) be a topological space. A subset \(O \subseteq X\) is said to be an open set, if \(O \in \mathcal{T}\)
Let \((X, \mathcal{T})\) be a topological space. A subset \(O \subseteq X\) is said to be an open set, if \(O \in \mathcal{T}\)
Date: nil
Created: 2024-10-12 Sa 23:00