derivation: uncertainty relation in quantum mechanics

[bhpayne]

https://en.wikipedia.org/wiki/Uncertainty_principle

• https://chemistry.stackexchange.com/a/59823
• https://en.wikipedia.org/wiki/Uncertainty_principle#Wave_mechanics_interpretation
• https://aip.scitation.org/doi/10.1063/1.1696139
• https://www.asc.ohio-state.edu/jayaprakash.1/631/uncert1.pdf
• https://plato.stanford.edu/entries/qt-uncertainty/#MathElab
• https://onlinelibrary.wiley.com/doi/pdf/10.1002/9781118148419.app1
• https://brilliant.org/wiki/heisenberg-uncertainty-principle/
• http://www.phys.ufl.edu/courses/phy4604/fall18/uncertaintyproof.pdf