"RIV/00216208:11320/11:10105162" . . "http://10.1007/s00233-010-9268-4" . . . . "Quasi-equational bases for graphs of semigroups,monoids and groups"@en . "P(LC505)" . "1"^^ . "1"^^ . . "11320" . . . "0037-1912" . "The graph of an algebra is defined as a relational structure that consists of the graphs induced by all basic operation. The paper is concerend with the questione whether there exists a finite basis of quasi-identities for the quasivariety that is generated by graphs of a given class of algebras. It is proved that no such basis exists if the class consists of semigroups one of which is a nontrivial semigroup that possesses a neutral element. The same result is true for a nontrivial class of monoids or groups." . "2011" . "Stronkowski, Michal" . "[07DBB726485E]" . . "Semigroup Forum" . . "groups; monoids; semigroups; graphs; for; bases; Quasi-equational"@en . . "11"^^ . . "225468" . "82" . . . . . . "Stronkowski, Michal" . "000288816300008" . "Quasi-equational bases for graphs of semigroups,monoids and groups" . . "DE - Spolkov\u00E1 republika N\u011Bmecko" . "Quasi-equational bases for graphs of semigroups,monoids and groups" . "Quasi-equational bases for graphs of semigroups,monoids and groups"@en . . "The graph of an algebra is defined as a relational structure that consists of the graphs induced by all basic operation. The paper is concerend with the questione whether there exists a finite basis of quasi-identities for the quasivariety that is generated by graphs of a given class of algebras. It is proved that no such basis exists if the class consists of semigroups one of which is a nontrivial semigroup that possesses a neutral element. The same result is true for a nontrivial class of monoids or groups."@en . . "RIV/00216208:11320/11:10105162!RIV12-MSM-11320___" .