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Rees semigroups of digraphs for classification of data

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Abstract

Recent research has motivated the investigation of the weights of ideals in semiring constructions based on semigroups. The present paper introduces Rees semigroups of directed graphs. This new construction is a common generalization of Rees matrix semigroups and incidence semigroups of digraphs. For each finite subsemigroup \(S\) of the Rees semigroup of a digraph and for every zero-divisor-free idempotent semiring \(F\) with identity element, our main theorem describes all ideals \(J\) in the semigroup semiring \(F_0[S]\) such that \(J\) has the largest possible weight.

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Acknowledgments

The first author was supported by Discovery grant DP0880501 from Australian Research Council. The second author was supported by ARC Discovery Grant DP0449469. The third author was supported by Discovery grant DP0450294.

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Correspondence to A. V. Kelarev.

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Communicated by Marcel Jackson.

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Abawajy, J., Kelarev, A.V., Miller, M. et al. Rees semigroups of digraphs for classification of data. Semigroup Forum 92, 121–134 (2016). https://doi.org/10.1007/s00233-014-9685-x

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  • DOI: https://doi.org/10.1007/s00233-014-9685-x

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