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Publication:3976739
zbMath0742.20058MaRDI QIDQ3976739
Publication date: 26 June 1992
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
variety of semigroupsvarieties of idempotent semigroupspartial groupoidamalgam of semigroupsexternal semigroup extensionunion of semigroups
Varieties and pseudovarieties of semigroups (20M07) Sets with a single binary operation (groupoids) (20N02)
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