Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Clopen set

  1. Nov 3, 2007 #1
    So, I know that R and null are clopen, but now to prove they are the only clopen subsets of R... without the idea of boundary points? I know how to do it with boundary points, but can it be done without?
     
  2. jcsd
  3. Nov 3, 2007 #2

    morphism

    User Avatar
    Science Advisor
    Homework Helper

    Show that R is connected.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook