Now what about Matrix-Matrix multiplication in Hilbert space? 8>
And then *Matrix inversion*!!? 8D
Which, would be a way of producing the inverse kernel of an arbitrary integral transform, right? :D
(That is, a roadmap of how to find a closed-form solution and/or a numerical approximation technique :> )
(Although numerical approximation is inherently finite-dimensional, so perhaps normal linear algebra, itself, serves as the numerical approximation of inverting integral transforms :> )
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