Open Sets Explorer Lesson 1
The topology vocabulary of ℂ, made draggable: test points with ε-disks to see what interior, boundary, open, and closed actually mean — the definitions every later theorem quietly relies on.
The topology vocabulary of ℂ, made draggable: test points with ε-disks to see what interior, boundary, open, and closed actually mean — the definitions every later theorem quietly relies on.