B blbl May 2010 4 0 May 26, 2010 #1 consider (ℝ,τ) , where τ={∅}∪{u⊆ℝ:{-π,π}⊆u}. Is [-4.4] open in (ℝ,τ) ? Justify your answer Is (-3,3) closed in (ℝ,τ) ? Justify your answer

consider (ℝ,τ) , where τ={∅}∪{u⊆ℝ:{-π,π}⊆u}. Is [-4.4] open in (ℝ,τ) ? Justify your answer Is (-3,3) closed in (ℝ,τ) ? Justify your answer

Drexel28 MHF Hall of Honor Nov 2009 4,563 1,566 Berkeley, California May 26, 2010 #2 blbl said: consider (ℝ,τ) , where τ={∅}∪{u⊆ℝ:{-π,π}⊆u}. Is [-4.4] open in (ℝ,τ) ? Justify your answer Is (-3,3) closed in (ℝ,τ) ? Justify your answer Click to expand... This is starting to get ridiculous. What do you think??? You still haven't responded as to what you really mean by this specific topology!

blbl said: consider (ℝ,τ) , where τ={∅}∪{u⊆ℝ:{-π,π}⊆u}. Is [-4.4] open in (ℝ,τ) ? Justify your answer Is (-3,3) closed in (ℝ,τ) ? Justify your answer Click to expand... This is starting to get ridiculous. What do you think??? You still haven't responded as to what you really mean by this specific topology!