Exercise 13, § 2
General Topology, VI
Show that, in the space , the frontier of a non-empty open set whose exterior is non-empty has the power of the continuum (use Proposition 4 of no. 4).
Solution
No solution has been written yet.
General Topology, VI
Show that, in the space , the frontier of a non-empty open set whose exterior is non-empty has the power of the continuum (use Proposition 4 of no. 4).
No solution has been written yet.