28P7.2
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28P7.2  
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Pattern type  Oscillator  

Number of cells  28  
Bounding box  12 × 11  
Period  7  
Mod  7  
Heat  5.1  
Volatility  0.42  
Strict volatility  0.42  
Discovered by  Dean Hickerson  
Year of discovery  1998  
 
 
 

28P7.2 is an unnamed period7 oscillator discovered by Dean Hickerson in 1998. In terms of its 28 cells, it is tied with oscillators burloaferimeter, 28P7.1, and 28P7.3 as the smallest known period 7 oscillator.^{[1]} In September, 2000 Mark Niemiec and Jason Summers found a 22glider synthesis of this oscillator.^{[2]}
A stator variant of this oscillator appeared seminaturally on October 28, 2018, in a symmetric soup submitted to Catagolue by carybe,^{[3]} and the canonical variant first appeared on August 12, 2022, in a symmetric soup by the Open Science Grid.^{[4]}
See also
 37P10.1
 Eater bridge eater, the catalyst this oscillator is based on
References
 ↑ "Class 2 Objects Catalog". Retrieved on March 14, 2009.
 ↑ Jason Summers' jslife pattern collection.
 ↑ Park Shinhwan (January 6, 2019). Re: Soup search results (discussion thread) at the ConwayLife.com forums
 ↑ attribute page, the soup in question
External links
 28P7.2 at Heinrich Koenig's Game of Life Object Catalogs
 All seminatural stator variants of 28P7.2 (Catagolue)
Categories:
 Patterns
 Oscillators with 28 cells
 Periodic objects with minimum population 28
 Patterns with 28 cells
 Patterns found by Dean Hickerson
 Patterns found in 1998
 Patterns that can be constructed with 16 gliders
 Oscillators
 Oscillators with period 7
 Oscillators with mod 7
 Oscillators with heat 5
 Oscillators with volatility 0.42
 Oscillators with strict volatility 0.42
 Patterns with 180degree rotation symmetry
 Unnamed periodic objects