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- W2786196375 abstract "We provide a new framework for a posteriori validation of vector-valued problems with componentwise tight error enclosures, and use it to design a symbolic-numeric Newton-like validation algorithm for Chebyshev approximate solutions of coupled systems of linear ordinary differential equations. More precisely, given a coupled differential system with polynomial coefficients over a compact interval (or continuous coefficients rigorously approximated by polynomials) and componentwise polynomial approximate solutions in Chebyshev basis, the algorithm outputs componentwise rigorous upper bounds for the approximation errors, with respect to the uniform norm over the interval under consideration. A complexity analysis shows that the number of arithmetic operations needed by this algorithm (in floating-point or interval arithmetics) is proportional to the approximation degree when the differential equation is considered fixed. Finally, we illustrate the efficiency of this fully automated validation method on an example of a coupled Airy-like system." @default.
- W2786196375 created "2018-02-23" @default.
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- W2786196375 date "2018-07-11" @default.
- W2786196375 modified "2023-10-11" @default.
- W2786196375 title "A Newton-like Validation Method for Chebyshev Approximate Solutions of Linear Ordinary Differential Systems" @default.
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- W2786196375 doi "https://doi.org/10.1145/3208976.3209000" @default.
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