Two questions:(adsbygoogle = window.adsbygoogle || []).push({});

First: If is possible to reduce the order of an ODE increasing the number of equations, so, is possible do the inverse patch? In other words, is possible reduce the number of equations of a system of ODE increasing the order?

Second: This technique of reducing and increasing of order is applicable to a PDE/system of PDE?

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# Reducing and increase of order and ODE

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