English Explanatory Dictionary

Lagrange polynomial

English dictionary entry

Meanings

noun
  1. For a given set of points (x_j,y_j) with no two x_j values equal, the polynomial of lowest degree that assumes at each value x_j the corresponding value y_j, so that the functions coincide at each point.

Word forms

Lagrange polynomial Lagrange polynomials

Etymology

Named after Joseph Louis Lagrange, who published on the topic in 1795, though the method was first discovered in 1779 by Edward Waring.

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