Machine Learning, Data Science, Artificial Intelligence.
correspondence with them. Dense Let ⟨𝑋, 𝑑⟩ be a metric space. A set 𝑌⊆𝑋 is dense in 𝑋 if, for every element 𝑥∈𝑋, there exists an element 𝑦∈𝑌 such that d(x, y) < ϵ for every 𝜖>0. Informally, this means that for any element outside of 𝑌, we can find an element within 𝑌 that is arbitrarily close to