Onion rings

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Onion rings
Onion rings image
Pattern type Agar
Period 1
Discovered by Unknown
Year of discovery Unknown

Onion rings is the name of an agar whose unit cell is composed of nested squares, which are fancied as resembling the rings of an onion. Actually there is a whole family of agars each of whose unit cells are 4n x 4n for a given n, further subdivided into quadrants. NE and SW contain onions with a block core, while NW and SE contain complementary onions. This arrangement inhibits all straight edges from sprouting live cells; each member of the family is a still life covering the whole plane.

External links

  • Onion rings at Eric Weisstein's Treasure Trove of Life