Assembly of nothing

[Jon Awbrey]

o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o

This is one of the impulses that led to the construction of riffs and rotes.
It was probably in my freshman chemistry class, or later when I worked as a
hospital orderly and used to run errands for the nuclear medicine unit that
I was thinking about the techniques of molecular tagging, which is like the
business of labelling graphs, only you have to label molecules with bits of
physical structure, an extra neutron or the like, that alters the resulting
structure.

So the question arises whether you can have a class of structures that is
closed under self-labeling.  Somewhat roughly trying to use your notation,
if A(B) is the set of all structures where those of type A are labeled by
those of type B, can you have the doamin equation A = A(A) for any type A?

Or something like that ...

Jon Awbrey

o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o
inquiry e-lab: http://stderr.org/pipermail/inquiry/
wikinfo: http://wikinfo.org/wiki.php?title=User:Jon_Awbrey
wp review: http://wikipediareview.com/index.php?showuser=398
o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o~~~~~~~~~o