Let \(X\) be a topological space. A subset \(A\subseteq X\) is dense in \(X\) if its closure is \(X\): \(\cl_X(A) = X\).
When is a subset $A \subseteq X$ dense in $X$?
Dense subsets
FD-BA2WU
FD-BA2WU
Let \(X\) be a topological space. A subset \(A\subseteq X\) is dense in \(X\) if its closure is \(X\): \(\cl_X(A) = X\).