👉 A conjugale is a type of topology on a set S, such that every subset U of S has a neighborhood basis consisting of open sets. A neighborhood base for a topological space X is a collection {U1, U2, ..., Un} where each Ui is an open set in X and Ui = Uj whenever i ≠ j. The term "conjugale" comes from the fact that a conjugale topology on S is a special case of the Hausdorff topology