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Search: MSC category 20F60 ( Ordered groups [See mainly 06F15] )

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1. CMB 2010 (vol 53 pp. 706)

Roberts, R.; Shareshian, J.
 Non-Right-Orderable 3-Manifold Groups We exhibit infinitely many hyperbolic $3$-manifold groups that are not right-orderable. Categories:20F60, 57M05, 57M50

2. CMB 2005 (vol 48 pp. 32)

Dąbkowski, Mieczysław K.; Przytycki, Józef H.; Togha, Amir A.
 Non-Left-Orderable 3-Manifold Groups We show that several torsion free 3-manifold groups are not left-orderable. Our examples are groups of cyclic branched coverings of $S^3$ branched along links. The figure eight knot provides simple nontrivial examples. The groups arising in these examples are known as Fibonacci groups which we show not to be left-orderable. Many other examples of non-orderable groups are obtained by taking 3-fold branched covers of $S^3$ branched along various hyperbolic 2-bridge knots. %with various hyperbolic 2-bridge knots as branched sets. The manifold obtained in such a way from the $5_2$ knot is of special interest as it is conjectured to be the hyperbolic 3-manifold with the smallest volume. Categories:57M25, 57M12, 20F60
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