Home Mathematics Monotonicity and total boundedness in spaces of “measurable” functions
Article
Licensed
Unlicensed Requires Authentication

Monotonicity and total boundedness in spaces of “measurable” functions

  • Diana Caponetti EMAIL logo , Alessandro Trombetta and Giulio Trombetta
Published/Copyright: November 30, 2017
Become an author with De Gruyter Brill

Abstract

We define and study the moduli d(x, 𝓐, D) and i(x, 𝓐,D) related to monotonicity of a given function x of the space L0(Ω) of real-valued “measurable” functions defined on a linearly ordered set Ω. We extend the definitions to subsets X of L0(Ω), and we use the obtained quantities, d(X) and i(X), to estimate the Hausdorff measure of noncompactness γ(X) of X. Compactness criteria, in special cases, are obtained.


The first author was partially supported by the grant by F.F.R. University of Palermo.



Cordially dedicated to Professor Paolo de Lucia on the occasion of his 80th birthday anniversary

Communicated by Anna De Simone


References

[1] Akhmerov, R. R.—Kamenskii, M. I.—Potapov, A. S.—Rodkina, A. E.—Sadovskii, B. N.: Measures of Noncompactness and Condensing Operators, Birkhäuser Verlag, Basel, Boston and Berlin, 1992.10.1007/978-3-0348-5727-7Search in Google Scholar

[2] Appell, J.—Banaś, J.—Merentes, N.: Some quantities related to monotonicity and bounded variation of functions, J. Math. Anal. Appl. 367 (2010), 476–485.10.1016/j.jmaa.2010.02.004Search in Google Scholar

[3] Appell, J.—De Pascale, E.: Some parameters associated with the Hausdorff measure of noncompactness in spaces of measurable functions, Boll. Un. Mat. Ital. (6) 3–B (1984), 497–515.Search in Google Scholar

[4] Appell, J.—Zabreiko, P. P.: Nonlinear Superposition Operators. Cambridge Tracts in Math. 95, Cambridge University Press, 1990.10.1017/CBO9780511897450Search in Google Scholar

[5] Avallone, A.—Trombetta, G.: Measures of noncompactness in the space L0 and a generalization of the Arzelà-Ascoli theorem, Boll. Un. Mat. Ital. (7) 5–B (1991), 573–587.Search in Google Scholar

[6] Ayerbe Toledano, J. M.—Domínguez Benavides, T.—López Acedo, G.: Measures of Noncompactness in Metric Fixed Point Theory, Birkhäuser Verlag, Basel, 1997.10.1007/978-3-0348-8920-9Search in Google Scholar

[7] Banaś, J.—Goebel, K.: Measures of Noncompactness in Banach Spaces. Lect. Notes Pure Appl. Math. 60, Dekker, New York, 1980.Search in Google Scholar

[8] Banaś, J.—Olszowy, L.: Measures of noncompactness related to monotonicity, Comment. Math. 41 (2001), 13–23.Search in Google Scholar

[9] Banaś, J.—Sadarangani, K.: On some measures of noncompactness in the space of continuous functions, Nonlinear Anal. 68 (2008), 377–383.10.1016/j.na.2006.11.003Search in Google Scholar

[10] Caponetti, D.—Lewicki, G.—Trombetta, G.: Control functions and total boundedness in the space Lo, Novi Sad J. Math. 32 (2002), 109–123.Search in Google Scholar

[11] Dunford, N.—Schwartz, J. T.: Linear Operators. Part I: General Theory, Wiley Classics Library, New York, 1988.Search in Google Scholar

[12] Tavernise, M.—Trombetta, A.: On convex total bounded sets in the space of measurable functions, J. Funct. Spaces Appl. (2012), Art. ID 174856, 9 pp.10.1155/2012/174856Search in Google Scholar

[13] Tavernise, M.—Trombetta, A.—Trombetta, G.: Total boundedness in vector-valued F-seminormed function spaces, Le Matematiche 66 (2011), 171–179.Search in Google Scholar

[14] Tavernise, M.—Trombetta, A.—Trombetta, G.: A remark on the lack of equi-measurability for certain sets of Lebesgue-measurable functions, Math. Slovaca 67 (2017), 1595–1601.10.1515/ms-2017-0073Search in Google Scholar

[15] Trombetta, G.—Weber, H.: The Hausdorff measures of noncompactness for balls in F-normed linear spaces and for subsets of L0, Boll. Un. Mat. Ital. (6) 5–C (1986), 213–232.Search in Google Scholar

Received: 2016-6-16
Accepted: 2016-10-26
Published Online: 2017-11-30
Published in Print: 2017-11-27

© 2017 Mathematical Institute Slovak Academy of Sciences

Articles in the same Issue

  1. Paolo de Lucia
  2. Arcs, hypercubes, and graphs as quotients of projective Fraïssé limits
  3. A note on field-valued measures
  4. Topologies and uniformities on d0-algebras
  5. On some properties of 𝓙-approximately continuous functions
  6. Porous subsets in the space of functions having the Baire property
  7. Rademacher’s theorem in Banach spaces without RNP
  8. Pettis integrability of fuzzy mappings with values in arbitrary Banach spaces
  9. Measure games on pseudo-D-lattices
  10. On some properties of k-subadditive lattice group-valued capacities
  11. Lp Spaces in vector lattices and applications
  12. The Choquet integral with respect to fuzzy measures and applications
  13. A note on the range of vector measures
  14. Ideal convergent subsequences and rearrangements for divergent sequences of functions
  15. Convergence results for a family of Kantorovich max-product neural network operators in a multivariate setting
  16. A generalization of the exponential sampling series and its approximation properties
  17. Monotonicity and total boundedness in spaces of “measurable” functions
  18. Vector lattices in synaptic algebras
  19. Density, ψ-density and continuity
  20. Feather topologies
  21. On disruptions of nonautonomous discrete dynamical systems in the context of their local properties
  22. Rate of convergence of empirical measures for exchangeable sequences
  23. On non-additive probability measures
  24. Equi-topological entropy curves for skew tent maps in the square
  25. On the lack of equi-measurability for certain sets of Lebesgue-measurable functions
Downloaded on 2.1.2026 from https://www.degruyterbrill.com/document/doi/10.1515/ms-2017-0065/html?lang=en
Scroll to top button