VandermondeMatrix

VandermondeMatrix[{x1,x2,…,xn}] gives an n×n Vandermonde matrix corresponding to the nodes xi.

VandermondeMatrix[{x1,x2,…,xn},k] gives an n×k Vandermonde matrix.

VandermondeMatrix[vmat] converts a Vandermonde matrix vmat to a structured array. 

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