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Jun 27, 2011 at 18:01 vote accept Sebastian Scholtes
Jun 27, 2011 at 16:35 answer added Anton Petrunin timeline score: 6
Jun 27, 2011 at 15:31 comment added Igor Rivin To amplify @Charlie's comment: how do you define the length of a curve? If as the limit of piecewise-smooth approximations, then the statement is immediate. If not, you should tell us your definition of length...
Jun 27, 2011 at 13:09 comment added Andreas Blass I'd think a non-rectifiable continuous curve could naturally be assigned infinite "length" (by using the same supremum of distances as in the definition for rectifiable curves), so that you wouldn't have to worry about them as candidates for minimizing lengths.
Jun 27, 2011 at 12:43 comment added Charlie Frohman Continuous curves don't neccessarily have a length. Let's add the hypothesis that the curve be rectifiable, also lets assume we are in a complete Riemannian manifold, then the answer is yes.
Jun 27, 2011 at 12:36 history asked Sebastian Scholtes CC BY-SA 3.0