Is there a continuous surjective map from $S^1$ to $[0,1]$?
Is there a continuous surjective from $S^1$ to $[0,1]$?
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general-topology
1 Answers
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HINT: Start with a projection map and then modify it slightly.
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0And it would be nice if the downvoter would expl$a$in what’s wrong, though I’m not going to hold my breath. – 2012-10-12