5 research outputs found
The number of locally invariant orderings of a group
We show that if a nontrivial group admits a locally invariant ordering, then
it admits uncountably many locally invariant orderings. For the case of a
left-orderable group, we provide an explicit construction of uncountable
families of locally invariant orderings; for a general group we provide an
existence theorem that applies compactness to yield uncountably many locally
invariant orderings.Comment: 13 page