Skip to main content

Applications

  • Chapter
  • First Online:
Set Function T

Part of the book series: Developments in Mathematics ((DEVM,volume 67))

  • 297 Accesses

Abstract

We present several applications of the set function \(\mathcal {T}\). We start with properties of continuously irreducible metric continua and their hyperspace of subcontinua and continuously type A′ metric θ-continua. We give sufficient conditions for the noncontractibility of continua. We study strict point \(\mathcal {T}\)-asymmetry of arc-smooth metric continua and dendroids. We consider R-continua in dendroids. We give a couple of characterizations of local connectedness. We present sufficient conditions for a closed subset of a continuum to have its image under \(\mathcal {T}\) to be a shore set in the continuum. We consider generalized inverse limits of nonaposyndetic metric homogeneous continua X using the set function \(\mathcal {T}|{ }_{\mathcal {F}_1(X)}\) as an upper semicontinuous bonding function. We present more relationships between the set functions \(\mathcal {T}\) and \(\mathcal {K}\).

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

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 54.99
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 69.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 69.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

  1. D. P. Bellamy and J. J. Charatonik, The Set Function \(\mathcal {T}\) and Contractibility of Continua, Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys., 25 (1977), 47–49.

    Google Scholar 

  2. D. P. Bellamy, L. Fernández and S. Macías, On \(\mathcal {T}\)-closed Sets, Topology Appl., 195 (2015), 209–225. (Special issue honoring the memory of Professor Mary Ellen Rudin.)

    Google Scholar 

  3. D. E. Bennet, A Characterization of Locally Connectedness By Means of the Set Function \(\mathcal {T}\), Fund. Math., 86 (1974), 137–141.

    Google Scholar 

  4. J. J. Charatonik, The Set Function \(\mathcal {T}\) and Homotopies, Colloquium Math., 39 (1978), 271–274.

    Google Scholar 

  5. S. T. Czuba, The Set Function \(\mathcal {T}\) and R-continuum. Bull. Acad. Polon. Sci. Ser. Sci. Math., 27 (1979), 303–308.

    Google Scholar 

  6. S. T. Czuba, The Concept of Pointwise Smooth Dendroids, Uspekhi Mat. Nauk., 34 (1979), 215–217.

    MathSciNet  MATH  Google Scholar 

  7. S. T. Czuba, Some Other Characterizations of Pointwise Smooth Dendroids, Comment. Math. Prace Mat., 24 (1984), 195–200.

    MathSciNet  MATH  Google Scholar 

  8. C. Eberhart and S. B. Nadler, Jr., Irreducible Whitney Levels, Houston J. Math., 6 (1980), 355–363.

    MathSciNet  MATH  Google Scholar 

  9. L. Fernández, On Strictly Point \(\mathcal {T}\)-asymmetric Continua, Topology Proc., 35 (2010), 91–96.

    Google Scholar 

  10. L. Fernández and S. Macías, The Set Functions \(\mathcal {T}\) and \(\mathcal {K}\) and Irreducible Continua, Colloquium Math., 121 (2010), 79–91.

    Google Scholar 

  11. R. W. FitzGerald, Connected Sets With a Finite Disconnection Property, in Studies in Topology (N. M. Stavrakas and K. R. Allen, Eds.), Academic Press, (1974), 139–173.

    Google Scholar 

  12. J. B. Fugate, G. R. Gordh, Jr. and L. Lum, Arc-smooth Continua, Trans. Amer. Math. Soc., 265 (1981), 545–561.

    Article  MathSciNet  Google Scholar 

  13. C. Good and S. Macías, Symmetric Products of Generalized Metric Spaces, Topology Appl., 206 (2016), 93–114.

    Article  MathSciNet  Google Scholar 

  14. J. T. Goodykoontz, Jr., Aposyndetic Properties of Hyperspaces, Pacific J. Math., 47 (1973), 91–98.

    Article  MathSciNet  Google Scholar 

  15. J. T. Goodykoontz, Some Functions on Hyperspaces of Hereditarily Unicoherent Continua, Fund. Math., 95 (1977), 1–10.

    Article  MathSciNet  Google Scholar 

  16. S. Gorka, Several Set Functions and Continuous Maps, Ph. D. Dissertation, University of Delaware, 1997.

    Google Scholar 

  17. W. T. Ingram and W. S. Mahavier, Inverse limits of upper semicontinuous set valued functions, Houston J. Math., 32 (2006), 119–130.

    MathSciNet  MATH  Google Scholar 

  18. J. L. Kelley, General Topology, Graduate Texts in Mathematics 27, Springer-Verlag, 1991.

    Google Scholar 

  19. K. Kuratowski, Topology, Vol. II, Academic Press, New York, N. Y., 1968.

    MATH  Google Scholar 

  20. R. Leonel, Shore and Center Points of a Continuum, Topology Proc., 46 (2015), 205–212.

    MathSciNet  MATH  Google Scholar 

  21. W. Lewis, Continuous Curves of Pseudo-arcs, Houston J. Math., 11 (1985), 91–99.

    Article  MathSciNet  Google Scholar 

  22. S. Macías, Aposyndetic Properties of Symmetric Products of Continua, Topology Proc., 22 (1997), 281–296.

    MathSciNet  MATH  Google Scholar 

  23. S. Macías, On Continuously Irreducible Continua, Topology Appl., 156 (2009), 2357–2363.

    Article  MathSciNet  Google Scholar 

  24. S. Macías, On Continuously Type A′ θ-continua, J. P. Journal of Geometry and Topology, 18 (2015), 1–14.

    Article  MathSciNet  Google Scholar 

  25. S. Macías, Topics on Continua, 2nd Edition, Springer-Cham, 2018.

    Google Scholar 

  26. S. Macías y S. B. Nadler, Jr., Z-sets in Hyperspaces, Q. & A. in General Topology, 19 (2001), 227–241.

    MathSciNet  MATH  Google Scholar 

  27. A. McCluskey and B. McMaster, Undergraduate Topology, Oxford University Press, 2014.

    MATH  Google Scholar 

  28. W. T. Moreland, Jr. Some Properties of Four Set Valued Set Functions, Master’s Thesis, University of Delaware, 1970.

    Google Scholar 

  29. S. Mrówka, On the Convergence of Nets of Sets, Fund. Math., 45 (1958), 237–246.

    Article  MathSciNet  Google Scholar 

  30. S. B. Nadler, Jr., Hyperspaces of Sets, Monographs and Textbooks in Pure and Applied Math., Vol. 49, Marcel Dekker, New York, Basel, 1978. Reprinted in: Aportaciones Matemáticas de la Sociedad Matemática Mexicana, Serie Textos # 33, 2006.

    Google Scholar 

  31. S. B. Nadler, Jr., Continuum Theory: An Introduction, Monographs and Textbooks in Pure and Applied Math., Vol. 158, Marcel Dekker, New York, Basel, Hong Kong, 1992.

    Google Scholar 

  32. V. C. Nall, Centers and Shore Points of a Dendroid, Topology Appl., 154 (2007), 2167–2172.

    Article  MathSciNet  Google Scholar 

  33. H. E. Schlais, Non-aposyndetic and Non-hereditary Decomposability, Pac. J. Math., 45 (1973), 643–652.

    Article  MathSciNet  Google Scholar 

  34. E. S. Thomas, Jr., Monotone Decompositions of Irreducible Continua, Dissertationes Math. (Rozprawy Mat.), 50 (1966), 1–74.

    MathSciNet  MATH  Google Scholar 

  35. L. E. Ward, Extending Whitney Maps, Pacific J. Math., 93 (1981), 464–469.

    Article  MathSciNet  Google Scholar 

  36. G. T. Whyburn, Analytic Topology, Amer. Math. Soc. Colloq. Publ., Vol. 28, Amer. Math. Soc., Providence, R. I., 1942.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

Copyright information

© 2021 The Author(s), under exclusive license to Springer Nature Switzerland AG

About this chapter

Check for updates. Verify currency and authenticity via CrossMark

Cite this chapter

Macías, S. (2021). Applications. In: Set Function T. Developments in Mathematics, vol 67. Springer, Cham. https://doi.org/10.1007/978-3-030-65081-0_7

Download citation

Publish with us

Policies and ethics