Rectangular groupoids and related structures
The quasivariety of groupoids (N,∗) satisfying the implication a∗b=c∗d⇒a∗d=c∗b=a∗b generalises rectangular semigroups and central groupoids. We call them rectangular groupoids and find three combinatorial structures based upon arrays, matrices and graphs that are closely related.
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| Format: | Online |
| Language: | English |
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Elsevier
2013
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3688338/ |