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Endomorphisms of monadic Boolean algebras

  • Autores: M. E. Adams, W. Dziobiak
  • Localización: Algebra universalis, ISSN 0002-5240, Vol. 57, Nº. 2, 2007, págs. 131-142
  • Idioma: inglés
  • DOI: 10.1007/s00012-007-2028-y
  • Texto completo no disponible (Saber más ...)
  • Resumen
    • A classical result about Boolean algebras independently proved by Magill [10], Maxson [11], and Schein [17] says that non-trivial Boolean algebras are isomorphic whenever their endomorphism monoids are isomorphic. The main point of this note is to show that the finite part of this classical result is true within monadic Boolean algebras. By contrast, there exists a proper class of non-isomorphic (necessarily) infinite monadic Boolean algebras the endomorphism monoid of each of which has only one element (namely, the identity), this being the first known example of a variety that is not universal (in the sense of Hedrlín and Pultr), but contains a proper class of non-isomorphic rigid algebras (that is, the identity is the only endomorphism).


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