Pi-heptomino
Revision as of 22:04, 30 March 2012 by Pooping Alien (talk | contribs)
| Pi-heptomino | |||||||
| View static image | |||||||
| Pattern type | Methuselah | ||||||
|---|---|---|---|---|---|---|---|
| Number of cells | 7 | ||||||
| Bounding box | 3 × 3 | ||||||
| Lifespan | 173 generations | ||||||
| L/I | 24.7 | ||||||
| Discovered by | Unknown | ||||||
| Year of discovery | Unknown | ||||||
| |||||||
| |||||||
Pi-heptomino (or pi) is a common heptomino that stabilizes at generation 173. The name "pi" is also applied to some slight variations of this object that follow that same evolutionary sequence - in a pi ship, for example, the pi-heptomino itself never actually arises. Forms that are synonymous with the pi-heptomino are displayed below.
In April 1992, Bill Gosper discovered that two blocks can be used to eat a pi, as shown below. The eating reaction takes 65 generations to complete. Gosper also discovered in the same month that a pi, along with two blocks and two blinkers, can be used to create a queen bee shuttle.
Image gallery
 Generation 1 of pi-heptomino |
 A grandparent (a pentaplet) and parent (a hexomino) of pi |
 An alternative parent of generation 1 |
 This pattern, which resembles the word "Pi", evolves exactly like the Pi-heptomino after two generations, stabilizing at generation 174. |
See also
External links
- Pi-heptomino at the Life Lexicon