Cauchy Determinant

In mathematics, the Cauchy determinant in linear algebra, named after Augustin Cauchy, is the determinant of the complex n×n matrix CM with entries
a_{ij}={1\over {(x_i+y_j)}} for 1 \le i,j \le n.\,
Here it is assumed that
x_i+y_j \ne 0\;\; \forall\; i,j.\,
   
The explicit formula for the determinant is
\mbox{det } \mbox{CM}=.\,

Example

The determinant of the Hilbert matrix is the case
xi = yi = i − ½.

 

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