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Thank you, Henrik! While it's disheartening to have what I hoped would be a sophisticated numerical integration method reduced to simple linearization, this at least works without resorting to manual specification of polynomials. What good are...
I don't think you're getting the thrust of my question. Yes, if I define `a` as `a = Transpose[{{a1, a2, a3}}]` and do the same for b and define `n` as 3 and use `ArrayFlatten[]` so that the scalar 0 is expanded into a column vector, WolframAlpha...