Solving systems of polynomial inequalities in subexponential time
Journal of Symbolic Computation
A Generalized Interval Arithmetic
Proceedings of the International Symposium on Interval Mathemantics
ESOP'05 Proceedings of the 14th European conference on Programming Languages and Systems
Symbolic methods to enhance the precision of numerical abstract domains
VMCAI'06 Proceedings of the 7th international conference on Verification, Model Checking, and Abstract Interpretation
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Expressions are multilinear when variable occurrences are linear and products have factors using different variables. We demonstrate that multilinear expressions are either constant or have never a local minimum or a local maximum. Therefore the interval of multilinear expressions may be computed precisely studying their values at the bounds of the variables therein. We then propose a technique for the interval analysis of generic expressions that transforms them into multilinear ones and computes the interval of the latters.