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Jun 13, 2023 at 8:57 vote accept Fetchinson0234
Jun 12, 2023 at 14:33 comment added Fetchinson0234 Unfortunately $K(x,y)$ is not only a function of $x-y$.
Jun 12, 2023 at 14:24 comment added Fetchinson0234 This sounds promising. But as the range of $n$ and $m$ grows it will become harder and harder to compute the determinant directly and I thought an iterative procedure might exist, similarly to finding actual eigenvalues. The lowest eigenvalue can be found by all sorts of tricky iterative procedures, which are usually cheaper than direct methods.
Jun 12, 2023 at 14:15 history answered Carlo Beenakker CC BY-SA 4.0