Orders on Trees and Free Products of Left-ordered Groups
Canadian mathematical bulletin, Tome 63 (2020) no. 2, pp. 335-347
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We construct total orders on the vertex set of an oriented tree. The orders are based only on up-down counts at the interior vertices and the edges along the unique geodesic from a given vertex to another.As an application, we provide a short proof (modulo Bass–Serre theory) of Vinogradov’s result that the free product of left-orderable groups is left-orderable.
Mots-clés :
orderable groups, free products, actions on trees, Bass–Serre tree
Dicks, Warren; Šunić, Zoran. Orders on Trees and Free Products of Left-ordered Groups. Canadian mathematical bulletin, Tome 63 (2020) no. 2, pp. 335-347. doi: 10.4153/S0008439519000389
@article{10_4153_S0008439519000389,
author = {Dicks, Warren and \v{S}uni\'c, Zoran},
title = {Orders on {Trees} and {Free} {Products} of {Left-ordered} {Groups}},
journal = {Canadian mathematical bulletin},
pages = {335--347},
year = {2020},
volume = {63},
number = {2},
doi = {10.4153/S0008439519000389},
url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000389/}
}
TY - JOUR AU - Dicks, Warren AU - Šunić, Zoran TI - Orders on Trees and Free Products of Left-ordered Groups JO - Canadian mathematical bulletin PY - 2020 SP - 335 EP - 347 VL - 63 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000389/ DO - 10.4153/S0008439519000389 ID - 10_4153_S0008439519000389 ER -
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