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Four-point one-sided second-derivative formula

At unit spacing, exactness through cubic polynomials gives

f^{''} (- 1) \approx 2 f (- 1) - 5 f (0) + 4 f (1) - f (2) .

Table of contents 36 1
- Sharp Peano-kernel constant for the four-point endpoint second derivative Four-point one-sided second-derivative formula 27

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