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de Bruijn approach to the B gliders

Figure 2.19: Cook's B-gliders and the de Bruijn diagram from which they may be derived. The outer periphery corresponds to the period-7, cycle 14 period rectangle of the ether tiles. If T3's and T1's alternate, there are four phases each of which has a cycle length of 8.
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Jose Manuel Gomez Soto 2002-01-31