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How to pass a function to a function?
Hi, How does one write a call a function that represents an operator? In other words, it takes a function and returns another function. For example, if you think of the Laplacian I want to do something like this (pseudo code): f[x_, y_] := x^4 +y^4 g = Laplacian[f]; N[g[1, 1], 50] How would one write "Laplacian"? Many thanks in advance, Aaron