@InertialObservr hey do you know of a function f(x,y) with Hessian determinant (x^2 + y^2)^-1 ?
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i wish i could PDEs are not my strong suit is there even a fundamental solution to the PDE for the hessian determinant?
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actually the notion of a fundamental solution is only for linear operators...
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It’s probably nasty but you could do it numerically
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it's important to have a function i can write down this is to go into a (multivariate) Laplace approximation
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