Where derivation == "intuitive routes", since a "law of physics" cannot be derived, only observed right or wrong.

TODO also comment on <why are complex numbers used in the Schrodinger equation?>.

Some approaches:
* https://en.wikipedia.org/w/index.php?title=Schr%C3%B6dinger_equation&oldid=964460597#Derivation[]: holy crap, this just goes all in into a <Lie group> approach, nice
* <Richard Feynman>'s derivation of the Schrodinger equation:
  * https://physics.stackexchange.com/questions/263990/feynmans-derivation-of-the-schrödinger-equation
  * https://www.youtube.com/watch?v=xQ1d0M19LsM "Class Y. Feynman's Derivation of the Schrödinger Equation" by doctorphys (2020)
* https://www.youtube.com/watch?v=zC_gYfAqjZY&list=PL54DF0652B30D99A4&index=53 "I5. Derivation of the Schrödinger Equation" by doctorphys


 Derivation of the Schrodinger equation

ID: derivation-of-the-schrodinger-equation