Sinn, Rainer

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Computing Hermitian determinantal representations of hyperbolic curves

2015, Plaumann, Daniel, Sinn, Rainer, Speyer, David E., Vinzant, Cynthia

Every real hyperbolic form in three variables can be realized as the determinant of a linear net of Hermitian matrices containing a positive definite matrix. Such representations are an algebraic certificate for the hyperbolicity of the polynomial and their existence has been proved in several different ways. However, the resulting algorithms for computing determinantal representations are computationally intensive. In this note, we present an algorithm that reduces a large part of the problem to linear algebra and discuss its numerical implementation.