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  2. Linear matrix inequality - Wikipedia

    en.wikipedia.org/wiki/Linear_matrix_inequality

    In convex optimization, a linear matrix inequality (LMI) is an expression of the form ⁡ ():= + + + + where = [, =, …,] is a real vector,,,, …, are symmetric matrices, is a generalized inequality meaning is a positive semidefinite matrix belonging to the positive semidefinite cone + in the subspace of symmetric matrices .

  3. Finsler's lemma - Wikipedia

    en.wikipedia.org/wiki/Finsler's_lemma

    Finsler's lemma can be used to give novel linear matrix inequality (LMI) characterizations to stability and control problems. [4] The set of LMIs stemmed from this procedure yields less conservative results when applied to control problems where the system matrices has dependence on a parameter, such as robust control problems and control of ...

  4. Trace inequality - Wikipedia

    en.wikipedia.org/wiki/Trace_inequality

    In mathematics, there are many kinds of inequalities involving matrices and linear operators on Hilbert spaces. This article covers some important operator inequalities connected with traces of matrices. [1] [2] [3] [4]

  5. List of inequalities - Wikipedia

    en.wikipedia.org/wiki/List_of_inequalities

    Bennett's inequality, an upper bound on the probability that the sum of independent random variables deviates from its expected value by more than any specified amount Bhatia–Davis inequality , an upper bound on the variance of any bounded probability distribution

  6. Kalman–Yakubovich–Popov lemma - Wikipedia

    en.wikipedia.org/wiki/Kalman–Yakubovich–Popov...

    It establishes a relation between a linear matrix inequality involving the state space constructs A, B, C and a condition in the frequency domain. The Kalman–Popov–Yakubovich lemma which was first formulated and proved in 1962 by Vladimir Andreevich Yakubovich [ 1 ] where it was stated that for the strict frequency inequality.

  7. Marvin Marcus - Wikipedia

    en.wikipedia.org/wiki/Marvin_Marcus

    According to Marcus's former doctoral student Robert Grone, Marcus did pioneering, fundamental research in "numerical ranges, matrix inequalities, linear preservers and multilinear algebra". [ 1 ] [ 10 ] Marcus was the author or co-author of more than 200 articles and problem solutions and more than 20 books.

  8. Spectrahedron - Wikipedia

    en.wikipedia.org/wiki/Spectrahedron

    A spectrahedron. In convex geometry, a spectrahedron is a shape that can be represented as a linear matrix inequality.Alternatively, the set of n × n positive semidefinite matrices forms a convex cone in R n × n, and a spectrahedron is a shape that can be formed by intersecting this cone with an affine subspace.

  9. Linear inequality - Wikipedia

    en.wikipedia.org/wiki/Linear_inequality

    The set of solutions of a real linear inequality constitutes a half-space of the 'n'-dimensional real space, one of the two defined by the corresponding linear equation. The set of solutions of a system of linear inequalities corresponds to the intersection of the half-spaces defined by individual inequalities.

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