Paradoxical Decomposition of Semigroups
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We introduce the concept of paradoxical decomposition for semigroups. We show that a semigroup S admits a left paradoxical decomposition if and only if S is not left amenable. Also Rosenbelatt and Willis introduced the configuration concept for groups and showed that amenability of groups is equivalent with existence of normalised solution for any system of configuration equations. We generalise it for semigroups.
- Paradoxical Decomposition of Semigroups
Volume 71, Issue 3 , pp 471-480
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