Nonexistence of Idempotent Means on Free Binary Systems
Canadian mathematical bulletin, Tome 62 (2019) no. 3, pp. 577-581

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DOI

Free binary systems are shown not to admit idempotent means. This refutes a conjecture of the author. It is also shown that the extension of Hindman’s theorem to nonassociative binary systems formulated and conjectured by the author is false.
DOI : 10.4153/CMB-2018-038-5
Mots-clés : amenability, binary system, Ellis’s Lemma, idempotent mean, Hindman’s Theorem, magma, nonassociative, Thompson’s group
Moore, Justin Tatch. Nonexistence of Idempotent Means on Free Binary Systems. Canadian mathematical bulletin, Tome 62 (2019) no. 3, pp. 577-581. doi: 10.4153/CMB-2018-038-5
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     author = {Moore, Justin Tatch},
     title = {Nonexistence of {Idempotent} {Means} on {Free} {Binary} {Systems}},
     journal = {Canadian mathematical bulletin},
     pages = {577--581},
     year = {2019},
     volume = {62},
     number = {3},
     doi = {10.4153/CMB-2018-038-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2018-038-5/}
}
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