LyapunovSolve

LyapunovSolve[a,c] finds a solution x of the matrix Lyapunov equation a.x+x.ac.

LyapunovSolve[a,b,c] solves a.x+x.bc.

LyapunovSolve[{a,d},c] solves a.x.d+d.x.ac.

LyapunovSolve[{a,d},{b,e},c] solves a.x.e+d.x.bc.

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