[FRIAM] Schwill Rock?

David Eric Smith desmith at santafe.edu
Wed Oct 13 13:34:56 EDT 2021


On 3:

https://depth-first.com/articles/2020/05/04/stereochemistry-and-atom-parity-in-smiles/ <https://depth-first.com/articles/2020/05/04/stereochemistry-and-atom-parity-in-smiles/>



> On Oct 13, 2021, at 12:54 PM, Jon Zingale <jonzingale at gmail.com> wrote:
> 
> Thanks Roger, Marcus. I am a newbie in this area and so it might be good for me to ask some potentially obvious questions about SMILES (since they are used everywhere).
> 
> 1. Is the SMILES isomorphism problem equivalent to the graph isomorphism problem, or is there some advantage from being context free parsable?
> 
> 2. In practice, do the edge cases that Roger mentioned effectively get added into the rewrite rules for the grammar or are they a separate kind of thing?
> 
> 3. How is chirality handled?
> 
> .-- .- -. - / .- -.-. - .. --- -. ..--.. / -.-. --- -. .--- ..- --. .- - .
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