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Article

Keywords:
totally ordered groups; ordered automorphisms; divisible groups; archimedean rank
Summary:
We study solvability of equations of the form $x^n=g$ in the groups of order automorphisms of archimedean-complete totally ordered groups of rank 2. We determine exactly which automorphisms of the unique abelian such group have square roots, and we describe all automorphisms of the general ones.
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