Skip to main content
Log in

On adjunction contexts and regular quasi-monads

  • Published:
Journal of Mathematical Sciences Aims and scope Submit manuscript

Abstract

The unit element of a ring A plays an important part in classical module theory. Its existence is equivalent to the adjointness of the free functor from the base category of abelian groups to the category of (unital) A-modules with the forgetful functor. Releasing the conditions on the “unit,” the relation between the free functor and the forgetful functor will also be changed. In this paper, we suggest how this situation may be handled.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. J. Beck, “Distributive laws,” in: Semin. on Triples and Categorical Homology Theory (ETH, Zurich, 1966/67), Springer-Verlag, Berlin, (1969), pp. 119–140.

    Chapter  Google Scholar 

  2. G. Böhm, “The weak theory of monads,” Adv. Math., arXiv:0902.4192 (2009).

  3. G. Böhm, F. Nill, and K. Szlachányi, “Weak Hopf algebras. I. Integral theory and C*-structure,” J. Algebra, 221, No. 2, 385–438 (1999).

    Article  MathSciNet  MATH  Google Scholar 

  4. T. Brzeziński and R. Wisbauer, Corings and Comodules, London Math. Soc. Lect. Notes Ser., 309, Cambridge Univ. Press, Cambridge (2003).

    Book  MATH  Google Scholar 

  5. S. Eilenberg and J. C. Moore, “Adjoint functors and triples,” Ill. J. Math., 9, 381–398 (1965).

    MathSciNet  MATH  Google Scholar 

  6. J. M. Fernández Vilaboa, R. González Rodríguez, and A. B. Rodríguez Raposo, “Preunits and weak crossed products,” J. Pure Appl. Algebra, 213, No. 12, 2244–2261 (2009).

    Article  MathSciNet  MATH  Google Scholar 

  7. P. T. Johnstone, “Adjoint lifting theorems for categories of algebras,” Bull. London Math. Soc., 7, No. 3, 294–297 (1975).

    Article  MathSciNet  MATH  Google Scholar 

  8. F. Kasch and A. Mader, Regularity and Substructures of Hom, Birkhäuser, Basel (2009).

    MATH  Google Scholar 

  9. S. Lack and R. Street, “The formal theory of monads, II,” J. Pure Appl. Algebra, 175, Nos. 1–3, 243–265 (2002).

    Article  MathSciNet  MATH  Google Scholar 

  10. M. Ya. Medvedev, “Semiadjoint functors and Kan extensions,” Sib. Mat. Zh., 15, 952–956 (1974).

    Article  Google Scholar 

  11. B. Mesablishvili and R. Wisbauer, “Bimonads and Hopf monads on categories,” J. K-Theory, doi: 10.1017/is010001014jkt105 (2010).

    MATH  Google Scholar 

  12. R. Street, “Weak distributive laws,” Theory Appl. Categ., 22, No. 12, 313–320 (2009).

    MathSciNet  MATH  Google Scholar 

  13. R. Wisbauer, “Weak corings,” J. Algebra, 245, No. 1, 123–160 (2001).

    Article  MathSciNet  MATH  Google Scholar 

  14. R. Wisbauer, “Algebras versus coalgebras,” Appl. Categ. Struct., 16, Nos. 1–2, 255–295 (2008).

    Article  MathSciNet  MATH  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to R. Wisbauer.

Additional information

Translated from Sovremennaya Matematika i Ee Prilozheniya (Contemporary Mathematics and Its Applications), Vol. 74, Proceedings of the International Conference “Modern Algebra and Its Applications” (Batumi, 2010), Part 1, 2011.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Wisbauer, R. On adjunction contexts and regular quasi-monads. J Math Sci 186, 808–810 (2012). https://doi.org/10.1007/s10958-012-1039-1

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10958-012-1039-1

Keywords

Navigation