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Aug 17, 2012 at 19:20 vote accept Fred.Fred
Aug 16, 2012 at 12:15 answer added Fred.Fred timeline score: 1
Aug 16, 2012 at 7:55 history edited Fred.Fred CC BY-SA 3.0
added 12 characters in body; edited title; added 70 characters in body; added 4 characters in body
Aug 16, 2012 at 4:23 comment added Andreas Blass There's also room for confusion as to whether the "length" of a path is the number of vertices or the number of edges. Maybe the two confusions can be made to cancel? I'm pretty sure the OP wants to prohibit paths that have 4 vertices and (therefore) 3 edges.
Aug 16, 2012 at 4:21 answer added Aaron Meyerowitz timeline score: 0
Aug 16, 2012 at 3:40 comment added Brendan McKay The confusion between 2 and 3 makes it incomprehensible.
Aug 16, 2012 at 0:29 answer added Igor Rivin timeline score: 0
Aug 15, 2012 at 23:19 comment added Gerry Myerson Title asks length at most 3, body asks length at most 2. Please edit for consistency.
Aug 15, 2012 at 20:29 answer added Gerhard Paseman timeline score: 0
Aug 15, 2012 at 19:17 history asked Fred.Fred CC BY-SA 3.0