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tiling by B-bar gliders at -6 in 12 generations

 
Figure 35: B-bar gliders have the same velocity as B gliders, but take three times as long to develop their cycle; however the two types, B and B-bar, may coexist.  

 
Figure 36: B-bar gliders can have varying widths and one or the other of two optional right margins.  



Harold V. McIntosh
E-mail:mcintosh@servidor.unam.mx