Cantor set
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The Cantor set is a fractal. It is made by starting with a line segment and repeatedly removing the middle third. The Cantor set is the (infinite) set of points left over. The Cantor set is "more infinite" than the set of natural numbers (1, 2, 3, 4, etc.).[1][2][3] This property is called uncountability.

Other websites
- Barile, Margherita and Weisstein, Eric W. "Cantor Set". Wolfram MathWorld. Retrieved 23 January 2012.
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: CS1 maint: multiple names: authors list (link) - Su, Francis E.; et al. "Cantor Set". Math Fun Facts. Retrieved 23 January 2012.
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(help) - Neal Carother. "The Cantor Set".