
doi: 10.1137/0614009
The additive inverse eigenvalue problem over an algebraically closed field \(F\) of characteristic zero is considered: given a matrix \(A\in\text{gl}(n,F)\) and a matrix Lie subalgebra \({\mathcal L}\subset\text{gl}(n,F)\), under which conditions on \({\mathcal L}\) one can arbitrarily assign the eigenvalues of \(A+L\), when the perturbation \(L\) belongs to \({\mathcal L}\)? This problem is motivated by some important examples in control theory as the pole assignment or the dynamic compensation of a linear system. Using \textit{S. Friendland}'s theorem [Israel J. Math. 11, 184-189 (1972; Zbl 0252.15004); for the case \({\mathcal L}={\mathcal D}_ n\), the Lie algebra of diagonal matrices], it is shown that the additive inverse eigenvalue problem has a solution for any matrix \(A\) if and only if \(\text{rank} {\mathcal L}=n\) and some element of \({\mathcal L}\) has distinct eigenvalues.
Eigenvalues, singular values, and eigenvectors, additive inverse eigenvalue problem, Lie algebras, linear system, linear control system, pole assignment, Pole and zero placement problems, matrix Lie subalgebra
Eigenvalues, singular values, and eigenvectors, additive inverse eigenvalue problem, Lie algebras, linear system, linear control system, pole assignment, Pole and zero placement problems, matrix Lie subalgebra
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