_:b17592454 "If one considers the variety of semigroups, one has the binary operation of multiplication defined on every semigroup."@en . _:b6903707 "It follows naturally that various classes of ordered sets can be characterized by semigroup properties of endomorphism semigroups."@en . _:b17592449 "If a semigroup S contains a zeroid, then every left zeroid is also a right zeroid, and vice versa, and the set K of all the zeroids of S is the kernel of S."@en . _:b17592450 . _:b17592451 . _:b17592452 "If one considers the variety of semigroups, one has the binary operation of multiplication defined on every semigroup."@en . _:b17592449 . _:b17592454 . _:b6903705 "(mathematics) Any set for which there is a binary operation that is closed and associative."@en . . _:b17592452 . _:b17592453 . _:b17592451 "1988, A. Ya A\u01D0zenshtat, Boris M. Schein (translator), On Ideals of Semigroups of Endomorphisms, Ben Silver (editor), Nineteen Papers on Algebraic Semigroups, American Mathematical Society Translations, Series 2, Volume 139, page 11,"@en . _:b17592456 "(mathematics) Any set for which there is a binary operation that is closed and associative."@en . "1" . _:b17592456 . _:b17592450 "1961, Alfred Hoblitzelle Clifford, G. B. Preston, The Algebraic Theory of Semigroups, page 70:"@en . . . _:b6903708 "If one considers the variety of semigroups, one has the binary operation of multiplication defined on every semigroup."@en . _:b17592453 "1988, A. Ya A\u01D0zenshtat, Boris M. Schein (translator), On Ideals of Semigroups of Endomorphisms, Ben Silver (editor), Nineteen Papers on Algebraic Semigroups, American Mathematical Society Translations, Series 2, Volume 139, page 11,"@en . _:b17592449 "1961, Alfred Hoblitzelle Clifford, G. B. Preston, The Algebraic Theory of Semigroups, page 70:"@en . _:b17592453 "It follows naturally that various classes of ordered sets can be characterized by semigroup properties of endomorphism semigroups."@en . _:b17592455 . _:b17592448 . _:b6903705 . _:b6903706 "If a semigroup S contains a zeroid, then every left zeroid is also a right zeroid, and vice versa, and the set K of all the zeroids of S is the kernel of S."@en . _:b17592446 . _:b17592454 "2012, Jorge Almeida, Benjamin Steinberg, \u201CSyntactic and Global Subgroup Theory: A Synthesis Approach\u201D, in Jean-Camille Birget, Stuart Margolis, John Meakin, Mark V. Sapir, editors, Algorithmic Problems in Groups and Semigroups, page 5:"@en . _:b17592446 "It follows naturally that various classes of ordered sets can be characterized by semigroup properties of endomorphism semigroups."@en . _:b17592447 . _:b17592445 "1961, Alfred Hoblitzelle Clifford, G. B. Preston, The Algebraic Theory of Semigroups, page 70:"@en . _:b17592445 . _:b17592447 "2012, Jorge Almeida, Benjamin Steinberg, \u201CSyntactic and Global Subgroup Theory: A Synthesis Approach\u201D, in Jean-Camille Birget, Stuart Margolis, John Meakin, Mark V. Sapir, editors, Algorithmic Problems in Groups and Semigroups, page 5:"@en . _:b17592446 "1988, A. Ya A\u01D0zenshtat, Boris M. Schein (translator), On Ideals of Semigroups of Endomorphisms, Ben Silver (editor), Nineteen Papers on Algebraic Semigroups, American Mathematical Society Translations, Series 2, Volume 139, page 11,"@en . _:b17592452 "2012, Jorge Almeida, Benjamin Steinberg, \u201CSyntactic and Global Subgroup Theory: A Synthesis Approach\u201D, in Jean-Camille Birget, Stuart Margolis, John Meakin, Mark V. Sapir, editors, Algorithmic Problems in Groups and Semigroups, page 5:"@en . _:b6903708 "2012, Jorge Almeida, Benjamin Steinberg, \u201CSyntactic and Global Subgroup Theory: A Synthesis Approach\u201D, in Jean-Camille Birget, Stuart Margolis, John Meakin, Mark V. Sapir, editors, Algorithmic Problems in Groups and Semigroups, page 5:"@en . _:b6903706 . _:b6903707 . _:b17592455 "(mathematics) Any set for which there is a binary operation that is closed and associative."@en . _:b17592445 "If a semigroup S contains a zeroid, then every left zeroid is also a right zeroid, and vice versa, and the set K of all the zeroids of S is the kernel of S."@en . _:b6903706 "1961, Alfred Hoblitzelle Clifford, G. B. Preston, The Algebraic Theory of Semigroups, page 70:"@en . _:b17592451 "It follows naturally that various classes of ordered sets can be characterized by semigroup properties of endomorphism semigroups."@en . _:b17592448 "(mathematics) Any set for which there is a binary operation that is closed and associative."@en . _:b6903708 . . _:b6903707 "1988, A. Ya A\u01D0zenshtat, Boris M. Schein (translator), On Ideals of Semigroups of Endomorphisms, Ben Silver (editor), Nineteen Papers on Algebraic Semigroups, American Mathematical Society Translations, Series 2, Volume 139, page 11,"@en . _:b17592447 "If one considers the variety of semigroups, one has the binary operation of multiplication defined on every semigroup."@en . _:b17592450 "If a semigroup S contains a zeroid, then every left zeroid is also a right zeroid, and vice versa, and the set K of all the zeroids of S is the kernel of S."@en .