Engineering Analysis/Lyapunov Equation

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[Lyapunov's Equation]

AM + MB = C

Where A, B and C are constant square matrices, and M is the solution that we are trying to find. If A, B, and C are of the same order, and if A and B have no eigenvalues in common, then the solution can be given in terms of matrix exponentials:

M = -\int_0^\infty e^{Ax}Ce^{Bx}dx
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