AnTiFreeze3
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Homework Statement
Alright, so I have this problem from a textbook I'm using:
There is a track (of unit length) with ##k## runners on it. At the time ##t=0##, the runners start from the same position and take off simultaneously. Each runner has a distinct speed. A runner is said to be "lonely," at a time ##t##, if the runner is a distance of ##\frac{1}{k}## from any other runner. Prove that each runner will be lonely at some point in time.
The Attempt at a Solution
So I obviously need to use induction for this. The case for ##k=1## is trivial, because there are no other runners, so that runner will always be a distance of ##\frac{1}{k}## from other runners. However, I'm stuck at this point, and am having trouble for cases where ##k\geq2##.