A method in numerical analysis which consists of approximating the derivatives of a solution of an ordinary or a partial differential equation. This leads to the solution of a linear system.

# Questions tagged [finite-differences]

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### Second derivative of discrete function

Given function $y[n]$ what is the best way to define the second derivative?
Some background to the question: in linear systems we often sample a continuous signal to a discrete one with sample rate of $T_s$, and then use Z-transform to find the…

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