This question is not actually a serious mathematical one. I have been reading Point Set Topology for a while, and turns out that there are various possible ways to define a topology. Most popular one is using open set axioms. Another one is using closure axioms, which was introduced by Kuratowski.
I am interested to know name of the researchers who had given the definition of topological spaces in the following ways:
- Definition through Open sets (The most popular one)
- Definition through neighbourhood system
- Definition through interior points
Thanks in advance.