Originally proposed at Wikidata:Property proposal/Natural science

Done: graph radius (P7391) (Talk and documentation)
Description radius of a graph graph radius (Q65556244) Quantity graph (Q141488) positive integers 1 claw graph (Q3115564) → 1 kite graph (Q3115458) → 2 cricket graph (Q3115459) → 1 diamond graph (Q3115555) → 1 Add radius of graph to instances of graphs and classes of graphs that has a same radius for all its instances. eventually complete (Q21873974)

#### Motivation

Radius is a well-known property of graphs. Although there is radius (P2120), there domains are totaly different. --Jd3main (talk) 18:27, 12 August 2019 (UTC)

#### Discussion

•   Comment @Jd3main: According to the Wolfram id link on graph radius (Q65556244) the value could be infinite (for a disconnected graph). Do we need to exclude such graphs, or is there a way of representing infinity that you have in mind here? I suppose the "novalue" value could work? Also are you interested in proposing a property for "graph diameter" which seems to be also relevant? ArthurPSmith (talk) 17:47, 27 August 2019 (UTC)
• Yes, I was trying to make proposals for both graph radius and graph diameter but ceased since I couldn't figure out how to include the draft into proposal page. I will try to write the proposal draft for graph diameter soon. --Jd3main (talk) 07:16, 17 September 2019 (UTC)
•   Comment @ArthurPSmith: @Jd3main: Could the domain be changed to Connected graph (Q12374945) to resolve the issue? Pixeldomain (talk) 07:01, 6 September 2019 (UTC)
• That's one option. We could also make the property item-valued, so for example it uses 1 (Q199) instead of "1" as a value, then infinity (Q205) would work too. ArthurPSmith (talk) 17:13, 6 September 2019 (UTC)
• Both of the ways make sense to me. If we want to restrict the domain, probably we need to solve the chaos in connective graph (Q230655) first. --Jd3main (talk) 06:50, 17 September 2019 (UTC)
•   Support Ok, let's try it with positive integer values and a restricted domain for now. ArthurPSmith (talk) 17:24, 17 September 2019 (UTC)
•   Support Iwan.Aucamp (talk) 05:36, 8 October 2019 (UTC)
•   Done @Iwan.Aucamp, Jd3main, ArthurPSmith: please make good use of it. --- Jura 10:55, 8 October 2019 (UTC)