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Evaluation of interval extension of the power function by graph decomposition

Evgueni Petrov

cs.MSarXiv:cs/0603052

Abstract

The subject of our talk is the correct evaluation of interval extension of the function specified by the expression xy without any constraints on the values of x and y. The core of our approach is a decomposition of the graph of xy into a small number of parts which can be transformed into subsets of the graph of xy for non-negative bases x. Because of this fact, evaluation of interval extension of xy, without any constraints on x and y, is not much harder than evaluation of interval extension of xy for non-negative bases x.

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