Submonoids of groups, and group-representability of restricted relation algebras
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DOI: 10.1007/s00012-018-0488-x
Abstract: Marek Kuczma asked in 1980 whether for every positive integer n, there exists a subsemigroup M of a group G, such that G is equal to the n-fold product $$M\,M^{-1} M\,M^{-1} \ldots \,M^{(-1)^{n-1}}$$MM-1MM-1…M(-1)n-1, but not… read more here.
Keywords: submonoids groups; group; representability restricted; relation ... See more keywords