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Collisions with A gliders

Although glider collisions and puffer trains are not the real province of de Bruijn diagrams, some information can occasionally be gleaned from the diagrams. For instance ``black hole'' configurations are often interpretable as collisions. Just manually adjusting the coexistence of A and B gliders, it looks like they should begin to collide in the generation-9 de Bruijn diagrams. These are still within computational limits, being 16 times as big as the generation-7 diagrams, but will involve millions of nodes.

However, two kinds of collision are easily described, and are discussed below. Besides the A - B collisions and the A - C collision converting into an F, there is the whole class of collisions by which B gliders extend the E or G gliders, but which has already been incorporated in the foregoing analysis. For A collisions, we can make the following table:


Table 3.2: Collisions between right moving A's and others.
target residue
B null
C1 F
C2 C1
C3 C2
D1 C2
D2 D1
E1 D1
E2 E1
E3 C2
F EBar


Similarly, a table can be constructed for B collisions:


Table 3.3: Collisions between left moving B gliders and others.
target residue
A null
C1 C2
C2 D1
C3 E1
D1 E1
D2 EBar + A
E(n) E(n+1)
F varied


Besides simple encounters, there is a multitude of collisions between glider polymers, and still more between closely spaced groups of polymers.



Subsections
next up previous contents
Next: the A - B Up: Glider Collisions Previous: maps of collision chains   Contents
Jose Manuel Gomez Soto 2002-01-31