Abstract
In this manuscript, we discuss the generalized almost automorphic concept of arbitrary bounded and unbounded time scales and initiate a new idea, namely the concept of changing-periodic time scales. We study weighted pseudo almost automorphic functions under the shift operator for translation and non-translation time scales. Important novel results and essential properties of such functions are established on irregular hybrid domains. The obtained results are valid for several equations defined over various time scales such as Quantum time scales, Cantor set time scales, Harmonic time scales, and so on. The idea of changing-periodic time scales presented in this paper will help in comprehension and eliminate the genuine lack that arises in the study of classical functions on time scales where the boundedness of the graininess function is required. The results are new, nontrivial, and complement the existing ones.
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References
Adivar, M.: A new periodicity concept for time scales. Math. Slovaca 63(4), 817–828 (2013)
Adivar, M., Raffoul, Y.: Existence of resolvent for Volterra integral equations on time scales. Bull. Aust. Math. Soc. 82(1), 139–155 (2010)
Agarwal, R., Bohner, M., Donal, R., Peterson, A.: Dynamic equations on time scales: a survey. J. Comput. Appl. Math. 141(1–2), 1–26 (2002)
Agarwal, R., Bohner, M.: Basic calculus on time scales and some of its applications. Resultate der Mathematik 35(1), 3–22 (1999)
Ahmad, B., Ntouyas, S.K., Tariboon, J., Alsaedi, A., Alsulami, H.: Impulsive fractional \(q\)-integro-difference equations with separated boundary conditions. Appl. Math. Comput. 281, 199–213 (2016)
Bochner, S.: Continuous mappings of almost automorphic and almost periodic functions. Proc. Natl. Acad. Sci. 52(4), 907–910 (1964)
Bohner, M., Rotchana, C.: The Beverton–Holt \(q\)-difference equation. J. Biol. Dyn. 7(1), 86–95 (2013)
Bohner, M., Peterson, A.: A survey of exponential functions on time scales. Cubo Math. Educ. 3(2), 285–301 (2001)
Bohner, M., Peterson, A.: Dynamic Equations on Time Scales. Birkhäuser, Basel (2001)
Bohner, M., Peterson, A. (eds.): Advances in Dynamic Equations on Time Scales. Birkhäuser, Boston (2003)
Bohner, M., Chieochan, R.: Floquet theory for \(q\)-difference equations. Sarajevo J. Math. 8(21)(2), 355–366 (2012)
Bohner, M., Mesquita, J.G.: Almost periodic functions in quantum calculus. Electron. J. Differ. Equ. 2018(197), 1–11 (2018)
Bohner, M., Mesquita, J.G.: Massera’s theorem in quantum calculus. Proc. Am. Math. Soc. 146(11), 4755–4766 (2018)
Blot, J., Mophou, G.M., N’Guerekata, G.M.: Weighted pseudo almost automorphic functions and applications to abstract differential equations. Nonlinear Anal.: Theory Methods Appl. 71, 903–909 (2009)
Coronel, A., Pinto, M., Sepulveda, D.: Weighted pseudo almost periodic functions, convolutions and abstract integral equations. J. Math. Anal. Appl. 15(435), 01382–99 (2016)
Dhama, S., Abbas, S.: Existence and stability of weighted pseudo almost automorphic solution of dynamic equation on time scales with weighted Stepanov-like \( S^p \) pseudo almost automorphic coefficients. Qual. Theory Dyn. Syst. 19(1), 1–22 (2020)
Dhama, S., Abbas, S., Debbouche, A.: Doubly-weighted pseudo almost automorphic solutions for stochastic dynamic equations with Stepanov-like coefficients on time scales. Chaos Solitons Fractals 1(137), 109899 (2020)
Dhama, S., Abbas, S.: Square mean almost automorphic solution of stochastic evolution equations with impulses on time scales. Differ. Equ. Appl. 10(4), 449–469 (2018)
Dhama, S., Abbas, S.: Existence and stability of square-mean almost automorphic solution for neutral stochastic evolution equations with Stepanov-like terms on time scales. Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas 113(2), 1231–1250 (2019)
Ezzinbi, K., Fatajou, K., N’Guerekata, G.M.: Pseudo almost automorphic solutions to some neutral partial functional differential equations in Banach spaces. Nonlinear Anal.: Theory Methods Appl. 70, 1641–1647 (2009)
Fink, A.: Almost Periodic Differential Equations. Lecture Notes in Mathematics, vol. 377. Springer, Berlin (1974)
Hilger, S.: Ein Makettenkalkäul mit Anwendung auf Zentrumsmannigfaltigkeiten. Ph.D thesis, Universität Wäurzburg (1988)
Jackson, B.: Partial dynamic equations on time scales. J. Comput. Appl. Math. 186(2), 391–415 (2006)
Kaufmann, E.R., Raffoul, Y.N.: Periodic solutions for a neutral nonlinear dynamical equation on a time scale. J. Math. Anal. Appl. 319, 315–325 (2006)
Li, Y., Wang, C.: Uniformly almost periodic functions and almost periodic solutions to dynamic equations on time scales. Abstr. Appl. Anal. 341520 (2011)
Li, Y., Wang, P.: Almost periodic solution for neutral functional dynamic equations with Stepanov-almost periodic terms on time scales. Discret. Contin. Dyn. Syst. Ser. S 10(3), 463–473 (2017)
Liang, J., Xiao, T., Zhang, J.: Decomposition of weighted pseudo-almost periodic. Nonlinear Anal. 73, 3456–3461 (2010)
Lizama, C., Mesquita, J.G.: Almost automorphic solutions of dynamic equations on time scales. J. Funct. Anal. 265(10), 2267–2311 (2013)
Pinto, M., Poblete, F., Sepúlveda, D.: Abstract weighted pseudo almost automorphic functions, convolution invariance and neutral integral equations with applications. J. Integral Equ. Appl. 31(4), 571–622 (2019)
Wang, C., Agarwal, R.P.: A further study of almost periodic time scales with some notes and applications. Abstr. Appl. Anal. 267384 (2014)
Wang, C., Agarwal, R.P.: Changing-periodic time scales and decomposition theorems of time scales with applications to functions with local almost periodicity and automorphy. Adv. Differ. Equ. 1, 296 (2015)
Wang, C., Agarwal, R.P.: Almost periodic solution for a new type of neutral impulsive stochastic Lasota–Wazewska time scale model. Appl. Math. Lett. 70, 58–65 (2017)
Wang, C., Agarwal, R.P., O’Regan, D., N’Guerekata, G.M.: \(n_0\)-Order weighted pseudo \(\Delta \)-almost automorphic functions and abstract dynamic equations. Mathematics 7(9), 775 (2019)
Wang, C., Agarwal, R.P., O’Regan, D., N’Guerekata, G.M.: Complete-closed time scales under shifts and related functions. Adv. Differ. Equ. 2018(1), 1–19 (2018)
Wang, C., Agarwal, R.P., O’ Regan, D., Sakthivel, R.: Theory of Translation Closedness for Time Scales—With Applications in Translation Functions and Dynamic Equations. Developments in Mathematics, vol. 62. Springer, Cham (2020)
Wang, C., Agarwal, R.P.: Combined Measure and Shift Invariance Theory of Time Scales and Applications. Developments in Mathematics, vol. 62. Springer, Cham (2022)
Wang, C., Agarwal, R.P., O’Regan, D.: Periodicity, almost periodicity for time scales and related functions. Nonauton. Dyn. Syst. 3, 24–41 (2016)
Wang, C., Agarwal, R.P., O’Regan, D.: \(n_0\)-order \(\Delta \)-almost periodic functions and dynamic equations. Appl. Anal. 97, 2626C2654 (2018)
Wang, C., Li, Y.: Weighted pseudo almost automorphic functions with applications to abstract dynamic equations on time scales. Annales Polonici Mathematici 3(108), 225–240 (2013)
Zheng, Z.M., Ding, H.S.: On completeness of the space of weighted pseudo almost automorphic functions. J. Funct. Anal. 268(10), 3211–3218 (2015)
Acknowledgements
We are thankful to the handling editor and anonymous reviewers for their comments and suggestions. Second author Syed Abbas thanks for the support of Matrices SERB project No. IITM/SERB/SB/284. Third author Manuel Pinto thanks for the support of Fondecyt project 1170466. Fourth author Samuel Castillo thanks for the support of DIUBB 164408 3/R.
Funding
This study was funded by Human Resource Development Group (IITM/SERB/SB/284), Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Santiago de Chile (Fondecyt project 1170466) and Universidad del Bío-Bío (DIUBB 164408 3/R).
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Communicated by Claudianor O. Alves.
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Dhama, S., Abbas, S., Pinto, M. et al. Weighted pseudo almost automorphic solution for abstract dynamic equations under translation and non-translation time scales with shift operators and unbounded graininess. Adv. Oper. Theory 8, 66 (2023). https://doi.org/10.1007/s43036-023-00290-w
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DOI: https://doi.org/10.1007/s43036-023-00290-w