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SAT
2010
Springer
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13 years 3 months ago
Simple but Hard Mixed Horn Formulas
Abstract. We study simple classes of mixed Horn formulas, in which the structure of the Horn part is drastically constrained. We show that the SAT problem for formulas in these cla...
Gayathri Namasivayam, Miroslaw Truszczynski
AUTOMATICA
1999
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13 years 4 months ago
Complexity of stability and controllability of elementary hybrid systems
In this paper, we consider simple classes of nonlinear systems and prove that basic questions related to their stability and controllability are either undecidable or computationa...
Vincent D. Blondel, John N. Tsitsiklis