I have in mind things like this [1]. I no longer have my undergraduate text or notes but I recall going through a similar exercise. [1] https://arxiv.org/pdf/p

I have in mind things like this [1]. I no longer have my undergraduate text or notes but I recall going through a similar exercise. [1] https://arxiv.org/pdf/physics/0610121.pdf https://arxiv.org/pdf/physics/0610121.pdf