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

Proof by Induction

  1. Feb 1, 2013 #1
    Is it a solid proof to show that the closure of a union equals the union of the closures of the sets via induction?
  2. jcsd
  3. Feb 1, 2013 #2
    How can we possibly know if your proof is valid if you don't show us your proof? Still, I'm not entirely sure why you would use induction here. Are you only considering the union of finitely many sets?
  4. Feb 1, 2013 #3


    Staff: Mentor

    A proof is a proof no matter if you use induction or some direct method as long as the logic of each step is impeccable.

    There are some math purists who disdain induction proofs for some theorems and prefer other styles of proof but thats beyond my math understanding to explain here:

  5. Feb 2, 2013 #4
    Yes of course. I'm talking about finite sets. I found a different way to prove it though. But the proof by induction crossed my mind.

    I should work it out some time and post it here. It seems feasible.
  6. Feb 2, 2013 #5
    great article. Thanks
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook