Randić's molecular connectivity index
The Randić index, also known as the connectivity index, of a graph is the sum of bond contributions where and are the degrees of the vertices making bond i ~ j.
History
This graph invariant was introduced by Milan Randić in 1975.[1] It is often used in chemoinformatics for investigations of organic compounds.
Notes
- Randić, M. (1975), "Characterization of molecular branching", Journal of the American Chemical Society, 97 (23): 6609–6615, doi:10.1021/ja00856a001.
gollark: burden of proof™
gollark: Nuclear is very cool and needs to be used more.
gollark: As far as I know it's something like ~~0.5% efficiency~~ (correction: wikipedia says ~5%) and the main advantage of photosynthesis is just that it produces convenient storable chemical energy as output.
gollark: I have a fun diagram too!
gollark: They don't *do* much, though, and you can't really change behavior to avoid it, and it's mostly irrelevant.
References
- Roberto Todeschini, Viviana Consonni (2009) "Molecular Descriptors for Chemoinformatics", Wiley-VCH, ISBN 978-3-527-31852-0
- Li, Xueliang; Shi, Yongtang (2008), "A survey on the Randić index", MATCH Communications in Mathematical and in Computer Chemistry, 59 (1): 127–156.
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