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Apr 13, 2017 at 12:56 history edited CommunityBot
replaced http://mathematica.stackexchange.com/ with https://mathematica.stackexchange.com/
Jan 21, 2015 at 1:55 history edited Joseph O'Rourke CC BY-SA 3.0
Replaced \mod with \bmod.
Jun 23, 2014 at 10:37 vote accept Joseph O'Rourke
Jun 22, 2014 at 15:02 answer added Douglas Zare timeline score: 16
Jun 22, 2014 at 11:16 comment added Joseph O'Rourke @DouglasZare: I see the $\frac{1}{2}$ probability per step, but not its consequences. Could you expand upon your observations? Thanks!
Jun 22, 2014 at 11:15 history edited Joseph O'Rourke CC BY-SA 3.0
Removed extra horiz rule.
Jun 22, 2014 at 1:25 comment added Douglas Zare Each partial path extends in each direction with probability at most $1/2$ per step, so the length of the path through a tile is dominated by a sum of two geometric random variables. So, the longest path is $O(\log n)$ with high probability. A lower bound of the same form follows from choosing the path ahead of time.
Jun 22, 2014 at 0:05 history asked Joseph O'Rourke CC BY-SA 3.0