Real Stability Testing

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Authors Prasad Raghavendra, Nick Ryder, Nikhil Srivastava arXiv ID 1610.00209 Category cs.DS: Data Structures & Algorithms Citations 6 Venue Information Technology Convergence and Services Last Checked 4 months ago
Abstract
We give a strongly polynomial time algorithm which determines whether or not a bivariate polynomial is real stable. As a corollary, this implies an algorithm for testing whether a given linear transformation on univariate polynomials preserves real-rootedness. The proof exploits properties of hyperbolic polynomials to reduce real stability testing to testing nonnegativity of a finite number of polynomials on an interval.
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