Abstract
In this paper, we consider a linear fuzzy Volterra integral equation of the second kind with a weakly singular kernel which may change sign in the domain of integration. We propose piecewise spline collocation methods with a graded mesh. By increasing the number of collocation points, we show that the numerical solution exists and converges to the exact solution. We obtain exact convergence rates depending on the smoothness of the solution and on the grading parameter of the mesh. We give sufficient conditions for the fuzziness of the approximate solution. The proposed method is illustrated by numerical examples that confirm the theoretical convergence estimates.
Similar content being viewed by others
Data availability
Enquiries about data availability should be directed to the authors.
References
Atkinson K, Han W (2005) Theoretical numerical analysis. Springer, Berlin, p 39
Alijani Z, Kangro U (2020) Collocation method for fuzzy Volterra integral equations of the second kind. Math Model Anal 25(1):146–166
Alijani Z, Kangro U (2021) On the smoothness of solution of fuzzy Volterra integral equation of the second kind with weakly singular kernels. Numer Funct Anal Optim 42(7):819–833
Balachandran K, Kanagarajan K (2005) Existence of solutions of general nonlinear fuzzy Volterra-Fredholm integral equations. Int J Stoch Anal 3(3):333–343
Bede B (2013) Mathematics of fuzzy sets and fuzzy logic. Springer, Berlin
Brunner H (2017) Volterra integral equations. An introduction to theory and applications. Cambridge Monographs on Applied and Computational Mathematics. Cambridge University Press, Cambridge
Brunner H (2004) Collocation methods for Volterra integral and related functional differential equations. Cambridge University Press, Cambridge
Brunner H, Pedas A, Vainikko G (2001) Piecewise polynomial collocation methods for linear Volterra integro-differential equations with weakly singular kernels. SIAM J Numer Anal 39:957–982
Diamond P, Kloeden P (2000) Metric topology of fuzzy numbers and fuzzy analysis. In: Dubois D, Prade H et al (eds) Handbook fuzzy sets. Kluwer Academic Publishers, Dordrecht
Diamond P (2002) Theory and applications of fuzzy Volterra integral equations. IEEE Trans Fuzzy Syst 10(1):97–102
Dubois D, Prade H (1978) Operations on fuzzy numbers. Int J Syst Sci 9(6):613–626
Friedman M, Ming M, Kandel A (1999) Numerical solution of fuzzy differential and integral equations. Fuzzy Sets Syst 106:35–48
Goetschel R, Vaxman W (1986) Elementary fuzzy calculus. Fuzzy Sets Syst 18:31–43
Kolk M, Pedas A, Vainikko G (2009) High order methods for Volterra integral equations with general weak singularities. Numer Funct Anal Optim 30:1002–1024
Kress R (2014) Linear integral equations, Applied mathematical sciences. Springer, Berlin
Pedas A, Vainikko G (2009) On the regularity of solutions to integral equations with nonsmooth kernel on union of open intervals. J Comput Appl Math 229:440–451
Pedas A, Vainikko G (1997) Superconvergence of piecewise polynomial collocation for nonlinear weakly singular integral equations. J Integral Eqs Appl 9:379–406
Saberidad F, Karbassi SM, Heydari M (2018) Numerical solution of nonlinear fuzzy Volterra integral equations of the second kind for changing sign kernels. Soft Comput. https://doi.org/10.1007/s00500-018-3668-x
Subrahmanyam PV, Sudarsanam SK (1996) A note on fuzzy Volterra integral equations. Fuzzy Sets Syst 81(2):237–240
Vainikko G (1993) Multidimensional weakly singular integral equations. Springer, Berlin
Vainikko G Weakly singular integral equations, Lecture notes, HUT, UT, 2006-2007, http://kodu.ut.ee/~gen/WSIElecturesSIAM.pdf
Zadeh LA (1965) Fuzzy sets. Inf Control 8:338–353
Zhu L, Wang Y (2015) Numerical solutions of Volterra integral equation with weakly singular kernel using SCW method. Appl Math Comput 260:63–70
Acknowledgements
The work of Zahra Alijani has been supported by the Estonian Research Council grant PRG864 and ERDF / ESF by the project ’Center for the development of artificial intelligence methods for the automotive industry of the region’ no. CZ.02.1.01 / 0.0 / 17-049 /0008414’. The work of Urve Kangro has been granted by the Estonian Research Council grant PRG864.
Funding
The work of Zahra Alijani has been supported by the Estonian Research Council grant PRG864 and ERDF / ESF by the project ‘Center for the development of artificial intelligence methods for the automotive industry of the region’ no. CZ.02.1.01 / 0.0 / 17-049 /0008414’. The work of Urve Kangro has been granted by the Estonian Research Council grant PRG864.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors have not disclosed any competing interests.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Alijani, Z., Kangro, U. Numerical solution of a linear fuzzy Volterra integral equation of the second kind with weakly singular kernels. Soft Comput 26, 12009–12022 (2022). https://doi.org/10.1007/s00500-022-07477-y
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00500-022-07477-y