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1998-06-24
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91 lines
#N Venetian blinds
#C This is a finite version of the infinite p2 oscillator
#C in which rows alternate full, full, empty, empty,
#C full, full, ... Two types of edges are shown, one
#C perpendicular to the rows and one at a 45 degree
#C angle. (It's easy to prove that there's no p2 edge
#C parallel to the rows.) Also shown are 3 type of
#C corners where the edges meet. This partly answers a
#C question of John Conway's: What's the maximum average
#C density of an infinite p2 pattern, and can it be
#C obtained as a limit of finite p2 patterns? This shows
#C that 1/2 is a lower bound. Hartmut Holzwart showed
#C that 8/13 is an upper bound.
#O Dean Hickerson, drhickerson@ucdavis.edu 9/13/92
#P -31 -36
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#P -31 1
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