[FRIAM] Schwill Rock?

[Roger Critchlow]

On Thu, Oct 14, 2021 at 4:46 PM Jon Zingale <jonzingale at gmail.com> wrote:

> "*having an atomic *weight allows you to break some degeneracies."
>
> Thanks Roger. This bit about the atomic weights seems the most interesting
> part, the only thing that can save the algorithm from exponential expense.
> I still don't have a good idea of what the final complexity ends up being.
>
> I meant to say atomic number, but weights also work to distinguish classes
of vertices.  But looking at Wieninger's canonicalization paper, it doesn't
make that much difference, you still end up summing out the spanning tree
from each atom in the molecule no matter what labels are on the vertices

>
> The question of what ends up being constructible and under what
> (potentially extreme) conditions is fascinating. I spent a chunk of the
> morning thinking about the time scales that one can expect certain
> compounds to come into existence, especially when some of their constituent
> atoms require supernova in the first place. Is it safe to say that there
> are compounds that exist only on Earth?
>

That's an odd question, it's a safe bet to take for or against, because I
don't see how anyone could establish it one way or another.

-- rec --
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