Principle of Least Action
http://edu-observatory.org/olli/Action/index.html

 
  Action principles lie at the heart of fundamental physics,
  from classical mechanics through quantum mechanics, particle
  physics, and general relativity.

  The principle of least action states that physical systems
  evolve along paths that minimize the action, a quantity
  integrating energy over time, providing a unifying framework
  for classical, quantum, and relativistic physics.
  
  The mathematics presented may seem overwhelming. Don't worry
  about that. What we care about are the primary concepts. The
  mathematics underpins those concepts, but it's the concepts
  that's important in this class.
  
     
  
  ⓵ The Principle of Least Action
     http://edu-observatory.org/olli/Action/Week1.html
  
  ⓶ Principle of Least Action - Quantum Mechanics
     http://edu-observatory.org/olli/Action/Week2.html
  
  ⓷ Principle of Least Action - Relativity
     http://edu-observatory.org/olli/Action/Week3.html
  
  ⓸ Principle of Least Action - Thermodynamics and Statistical Mechanics
     http://edu-observatory.org/olli/Action/Week4.html
  
 



 
    sam.wormley@icloud.com