Small graph rewrite systems (2)

I continue from the last post on small graph rewrite systems. Let’s see some more details about the SH-2.1 system.

The last post ends with a realization of the DIST rewrite in SH-2.1. We can do better than that, by showing that the DIST rewrite is reversible:




As you see, the two pairs yellow-blue and blue-blue play the role  of enzymes.

Another two interesting reactions are the following:


So the “yellow ends” duplicate, with a pair blue-blue as an enzyme.



The supplementary “blue ends” prune themselves, in a sort  of duality  with the “yellow ends”. This time there is a yellow-blue pair enzyme.


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