Abstract

We consider the problem of exploring an anonymous line by a team of k identical, oblivious, asynchronous deterministic mobile robots that can view the environment but cannot communicate. We completely characterize sizes of teams of robots capable of exploring an n-node line. For k < n , exploration by k robots turns out to be possible, if and only if either k = 3 , or k ⩾ 5 , or k = 4 and n is odd. For all values of k for which exploration is possible, we give an exploration algorithm. For all others, we prove an impossibility result.

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