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Martin Sleziak
Martin Sleziak
4:52 AM
Two new tags forbidden-subgraphs and hamiltonicity created by Scientifica in the same question. We already have hamiltonian-path tag.
2
Q: If every $H$-free $2$-connected graph is Hamiltonian then $H$ is $P_3$

ScientificaI'm stuck with exercise 5 page 72 of Harris, Hirst and Mossinghoff's Combinatorics and Graph Theory: Show that if being $H$-free implies Hamiltonicity in $2$-connected graphs (where $H$ is connected), then $H$ is $P_3$. A $P_3$-free $2$-connected graph is indeed Hamiltonian because $P...

combinatorics graph-theory graph-connectivity hamiltonicity forbidden-subgraphs
The same user created also tag-excerpt and tag-wiki for (hamiltonicity) and tag-excerpt for (forbidden-subgraph).
 
 
13 hours later…
Xander Henderson
Xander Henderson
5:59 PM
I have recently seen a lot of proposed tag wiki edits like this one, all coming from the same user. It appears that this user is attempting to build out the tag wiki (which is good) by directly copying descriptions from Wikipedia (which, I think, is bad, as there exists a "Copied Content" reason-to-reject). Was it appropriate to reject the linked edit proposal?
 

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