This reminds me of something I saw yesterday in [1], about Perturbation Theory[2]. [1] https://www.youtube.com/playlist?list=PL43B1963F261E6E47 https://www.you

This reminds me of something I saw yesterday in [1], about Perturbation Theory[2]. [1] https://www.youtube.com/playlist?list=PL43B1963F261E6E47 https://www.youtube.com/playlist?list=PL43B1963F261E6E47 [2] https://en.wikipedia.org/wiki/Perturbation_theory https://en.wikipedia.org/wiki/Perturbation_theory