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arXiv · 2204.03377

The $\mathcal{R}$-height of semigroups and their bi-ideals

Craig Miller
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Abstract

The $\mathcal{R}$-height of a semigroup $S$ is the height of the poset of $\mathcal{R}$-classes of $S,$ i.e. the supremum of the lengths of chains of $\mathcal{R}$-classes. Given a semigroup $S$ with finite $\mathcal{R}$-height, we establish bounds on the $\mathcal{R}$-height of bi-ideals, one-sided ideals and two-sided ideals; in particular, these substructures inherit the property of having finite $\mathcal{R}$-height. We then investigate whether these bounds can be attained.

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Craig Miller. 2022-04-07. The $\mathcal{R}$-height of semigroups and their bi-ideals. https://arxiv.org/abs/2204.03377

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