Beta Phase: Square45 is currently in beta testing. Expect some features or content to be incomplete or missing.
45

Action Integral

The action integral, S=t1t2extL(x,x˙,t)dtS = \int_{t_1}^{t_2} ext{L}(x, \dot{x}, t) dt, represents the time integral of the Lagrangian, central to the path integral.