Recent content by jack8572357

  1. J

    Show P^1 is homemorphic to S^1

    Would you say it in detail?I have no idea about it.
  2. J

    Show P^1 is homemorphic to S^1

    P^1 is the set of all line in R^2(or R^2\(0,0), I forget which one is right) through the origion.
  3. J

    Show P^1 is homemorphic to S^1

    Show P^1 is homemorphic to S^1 I know I need to prove there is a function satisfying it's 1-1 ,onto,continuous,and the inverse of function is continuous.However, I can't find it.Please help!
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