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Math That Goes On Forever but Never Repeats | Quanta Magazine

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63% Informative

A retired print technician recently discovered the first “aperiodic monotile” — a single tile that fills up the plane in a non-repeating pattern.

When a tiling is equivalent to itself after a translation, it has “translational symmetry” This shows that the two tilings fo Two w the same pattern.

A-tiles: A, AA, AAA, AAAA, B, BB, BBB, BBBB, ABABA, AABABAABABABA.

The new rules allow us to generate tiling mosques unlike our first example, don’t repeat.

In the resulting pattern — BAB — will never appear again.

David Smith, a recreational mathematician, artist and tiling enthusiast, discovered the first known aperiodic monotile last November.

The hat tile is actually one of an infinite family of til first It is a set of tiles and rules that allows us to tile the line but will never allow translational symmetry. ’s _highLightText__NxlGi">one one AABB First one Joseph Samuel Myerstwo two d_highLightText__NxlGi">Chaim Goodman-Strauss B. Text__NxlGi">Craig Kaplan Smith Smith< first > firstBAB David SmithABABABABABABA ss="summaryFeed_highLightText__NxlGi">Last November two only one two B. Text__NxlGi">British ABA ghLightText__NxlGi">Roger Penrose BABABABABABAB _highLightText__NxlG second 1970s ’s eed_highLightText__NxlGi">sixfirst spa BABABABABABAB ary ABABABABABABA tText__NxlGi">a few years one class="sum two yFeed_highLightText__NxlGi">20,4 BABABABABABAB pan ABABABABABABA ryFeed_highLightText__NxlGi">AAAABBBAAABBBAAAA two ext__NxlGi">AAA ABA two Feed_highLightText__NxlGi">BABABABABABABABA las ABABABABABABA d_highLightText__NxlGi">at least one one lass=" two maryFeed_ ABABABABABABA __N ABABABABABABA an> 2 2 BAB Now two yFeed_highLightText__NxlGi">1 Translational ghtText__NxlGi">1 one eed_highLightText__NxlGi">two ABABABABABABA >Notice B two ABAB m ABABAB d_highLig one ext__NxlGi">BBB BBtwo > AAAA AAA one one the 19 two four < one n class="summaryFeed_highLightText__NxlGi">three two first AAABABA ABABABABABABA B. - Next

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