Recall that some points admit more than one representation in this notation, as for example 1/3, that can be written as 0.13 but also as 0.022222...3, and 2/3, that can be written as 0.23 but also as 0.12222...3.
Ker ni nikoli v eni od sredinskih tretjin, ostane v množici, in tudi ni ena od krajnih točk katerekoli srednje tretjine.