Check out the math & physics courses that I mentioned (many of which are free!) and support this channel by going to https://brilliant.org/Sabine/ where you can create your Brilliant account. The first 200 will get 20% off the annual premium subscription. In the diagram at 4 minutes 30 seconds, the labels for h_1 and h_2 are mixed up. Sorry about that! Subscribe to my weekly science newsletter: https://sabinehossenfelder.com/ Everything I am talking about here is standard material of undergrad physics textbooks. My personal favorite is good old Goldstein https://en.wikipedia.org/wiki/Classic… On variational principles more specifically I quite like this textbook: https://link.springer.com/book/10.100… You can support me on Patreon: / sabine 0:00 Intro 0:45 Optimization 1:35 Shortest Path 3:20 Least Time 5:36 Least Action 10:27 Quantum Mechanics 11:53 Sponsor Message.
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