Uploaded February 2023 | Updated September 2026, 1 week ago

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Polyakov's Lectures on Modern Classical Dynamics

Lecture 3 :
Which equations can and can’t follow from the action and the relation to the energy conservation. Time-reversal symmetry. Fixing the Lagrangian of a free particle based on the symmetries.

These lectures were given by Professor Alexander Polyakov when he taught a graduate course on Modern Classical Dynamics at Princeton in the Spring semesters of 2013 and 2014.

Check here for full playlist: youtube.com/playlist?list=PLaNkJORnlhZlVDfLPMkokhDs76-5pJoI5