= Ostrogradsky instability
{wiki=Ostrogradsky_instability}
Ostrogradsky instability is a phenomenon that arises in the context of classical field theory and, more broadly, in the study of higher-derivative theories. It is named after the mathematician and physicist Mikhail Ostrogradsky, who is known for his work on the dynamics of systems described by higher-order differential equations. In classical mechanics, the equations of motion for a system are typically second-order in time.
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