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• W4387266645 startingPage "114221" @default.
• W4387266645 abstract "We construct a continuous domain, as a model of interval analysis, for temporal discretization of differential equations. By using this domain, and the domain of Lipschitz maps, we formulate a generalization of the Euler operator, which exhibits second-order convergence. We prove computability of the operator within the framework of effectively given domains. The operator only requires the vector field of the differential equation to be Lipschitz continuous, in contrast to the related operators in the literature which require the vector field to be at least continuously differentiable. Within the same framework, we also analyze temporal discretization and computability of another variant of the Euler operator formulated according to Runge-Kutta theory. We prove that, compared with this variant, the second-order operator that we formulate directly, not only imposes weaker assumptions on the vector field, but also exhibits superior convergence rate. We implement the first-order, second-order, and Runge-Kutta Euler operators using arbitrary-precision interval arithmetic, and report on some experiments. The experiments confirm our theoretical results. In particular, we observe the superior convergence rate of our second-order operator compared with the Runge-Kutta Euler and the common (first-order) Euler operators." @default.
• W4387266645 created "2023-10-03" @default.
• W4387266645 creator A5058087229 @default.
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• W4387266645 date "2023-11-01" @default.
• W4387266645 modified "2023-10-10" @default.
• W4387266645 title "Recursive Solution of Initial Value Problems with Temporal Discretization" @default.
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• W4387266645 doi "https://doi.org/10.1016/j.tcs.2023.114221" @default.
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