Аннотация:
We construct a free normal diband, a free $(\ell n,n)$-diband, a free $(n,rn)$-diband and a free $(\ell n,rn)$-diband. We also describe the structure of free normal dibands and characterize some least congruences on these dibands.
Ключевые слова:normal diband, free normal diband, diband of subdimonoids, dimonoid, semigroup.
Полный текст:
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