CauchyMatrix
CauchyMatrix[x,y] represents the Cauchy matrix given by the generating vectors x and y as a structured array.
CauchyMatrix[x] is equivalent to CauchyMatrix[x,x].
CauchyMatrix[cmat] converts a Cauchy matrix cmat to a structured array.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.