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Beyond the hypothesis of boundedness for the random coefficient of the Legendre differential equation with uncertainties

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  • Jornet, Marc

Abstract

In this paper, we aim at relaxing the boundedness condition for the input coefficient A of the Legendre random differential equation, to permit important unbounded probability distributions for A. We demonstrate that the formal solution constructed using the Fröbenius approach is indeed the mean square solution on the domain (−1,1), under mean fourth integrability of the initial conditions X0, X1 and sublinear growth of the 8n-th norm of A. Under linear growth of the 8n-th norm of A, the mean square solution is only defined on a neighborhood of zero contained in (−1,1). These conditions are closely related to the finiteness of the moment-generating function of A. Numerical experiments on the approximation of the solution statistics for unbounded equation coefficients A illustrate the theoretical findings.

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  • Jornet, Marc, 2021. "Beyond the hypothesis of boundedness for the random coefficient of the Legendre differential equation with uncertainties," Applied Mathematics and Computation, Elsevier, vol. 391(C).
    • Handle: RePEc:eee:apmaco:v:391:y:2021:i:c:s0096300320305920
    DOI: 10.1016/j.amc.2020.125638
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    References listed on IDEAS

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    1. Burgos, C. & Cortés, J.-C. & Debbouche, A. & Villafuerte, L. & Villanueva, R.-J., 2019. "Random fractional generalized Airy differential equations: A probabilistic analysis using mean square calculus," Applied Mathematics and Computation, Elsevier, vol. 352(C), pages 15-29.
    2. Gwo Dong Lin, 2017. "Recent developments on the moment problem," Journal of Statistical Distributions and Applications, Springer, vol. 4(1), pages 1-17, December.
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