Recent content by Deadward1994

  1. D

    Is the Subset D={(x,y)| x≠0 and y≠0} an Open Set in R^2?

    Sorry about that, I miss quoted the question
  2. D

    Is the Subset D={(x,y)| x≠0 and y≠0} an Open Set in R^2?

    Homework Statement Show that the subset D={(x,y)| x≠0 and y≠0} is an open set in R^2 . Homework Equations Open set: U is a subset of R^n. U is an open set when for every point X1, contained within U, there exists some open disk centered around X1 with radius r>0, that is completely contained...