Reducibility of joins involving some locally trivial pseudovarieties
In this paper, we show that sigma-reducibility is preserved under joins with K, where K is the pseudovariety of semigroups in which idempotents are left zeros. Reducibility of joins with D, the pseudovariety of semigroups in which idempotents are right zeros, is also considered. In this case, we wer...
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| Format: | article |
| Language: | eng |
| Published: |
2004
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| Online Access: | http://hdl.handle.net/1822/36667 |
| Country: | Portugal |
| Oai: | oai:repositorium.sdum.uminho.pt:1822/36667 |