A semilattice of varieties of completely regular semigroups
Completely regular semigroups are unions of their (maximal) subgroups with the unary operation within their maximal subgroups. As such they form a variety whose lattice of subvarieties is denoted by $\mathcal L(\mathcal C\mathcal R)$. We construct a 60-element $\cap$-subsemilattice and a 38-element...
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| Format: | Article |
| Language: | English |
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Institute of Mathematics of the Czech Academy of Science
2020-04-01
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| Series: | Mathematica Bohemica |
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| Online Access: | http://mb.math.cas.cz/full/145/1/mb145_1_1.pdf |