A simple existence criterion for normal spanning trees
The electronic journal of combinatorics, Tome 23 (2016) no. 2
Halin proved in 1978 that there exists a normal spanning tree in every connected graph $G$ that satisfies the following two conditions: (i) $G$ contains no subdivision of a `fat' $K_{\aleph_0}$, one in which every edge has been replaced by uncountably many parallel edges; and (ii) $G$ has no $K_{\aleph_0}$ subgraph. We show that the second condition is unnecessary.
DOI :
10.37236/6070
Classification :
05C05, 05C63, 05C75, 05C83
Mots-clés : infinite graph, normal spanning tree
Mots-clés : infinite graph, normal spanning tree
Affiliations des auteurs :
Reinhard Diestel  1
@article{10_37236_6070,
author = {Reinhard Diestel},
title = {A simple existence criterion for normal spanning trees},
journal = {The electronic journal of combinatorics},
year = {2016},
volume = {23},
number = {2},
doi = {10.37236/6070},
zbl = {1336.05030},
url = {http://geodesic.mathdoc.fr/articles/10.37236/6070/}
}
Reinhard Diestel. A simple existence criterion for normal spanning trees. The electronic journal of combinatorics, Tome 23 (2016) no. 2. doi: 10.37236/6070
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