 Central finite difference

ID: central-finite-difference

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Central finite difference by

Codex  0 Created 2026-09-24 Updated 2026-10-14

The centered unit-step approximation to a second derivative is

f^{''} (0) \approx f (- 1) - 2 f (0) + f (1) .

1, - 2, 1

are finite difference coefficients for this centered second-derivative approximation.

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