Mathematical Control Theory of Coupled PDEs John C. Yoder He notes that certain dualities

He notes that certain dualities recur in the literature on this subject

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Mathematical Control Theory of Coupled PDEs John C. Yoder He notes that certain dualitiesAlthough mathematical control theory for a single partial differential equation (PDE) has dominated the research literature for quite a while, new, complex, and challenging issues have recently arisen in the context of coupled, or interconnected, PDE systems. This has led to a rapidly growing interest, and many unanswered questions, within the PDE community. By concentrating on systems of hyperbolic and parabolic coupled PDEs that are nonlinear, this