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单词 Lagrange interpolation
释义
Lagrange interpolation

Mathematics
  • If a function has n known values (x1, y1), (x2, y2),…, (xn, yn), where the xi are distinct, then there is s unique polynomial f(x) of degree less than n such that f(xi) = yi for each i. It is given by the formula

    f(x)=y1(xx2)(xxn)(x1x2)(x1x3)(x1xn)++yn(xx1)(xxn1)(xnx1)(xnx2)(xnxn1)


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