# Definition:Derivative/Higher Derivatives/Second Derivative/Notation/Newton Notation

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## Newton's Notation for Second Derivative

Newton's notation for the second derivative of a function $y = \map f t$ with respect to the independent variable $t$ is:

- $\map {\ddot f} t$

or:

- $\ddot y$

This notation is usually reserved for the case where the independent variable is time.