Al-Omeri, Wadei; Noorani, M. Salmi Md.; Al-Omari, A.(Editorial Universitat Politècnica de València, 2014-04-07)
[EN] An ideal on a set X is a nonempty collection of subsetsof X which satisfies the following conditions (1)A ∈ I and B ⊂ A implies B ∈ I; (2) A ∈ I and B ∈ I implies A ∪ B ∈ I. Given a topological space (X; ) an ideal I ...