New posts in Lagrangian Formalism

Why are Lagrangians linear in $\dot{q}$ so ubiquitous? Gauge theory, Berry phase, Dirac Equation, and more

Peskin & Schroeder Chap. 7.1 ultraviolet divergence

In a Lagrangian, why can't we replace kinetic energy by total energy minus potential energy?

Can the Lagrangian be written as a function of ONLY time?

Lagrangian potential for Newtonian gravity

How to compute the quantum effective action from 1PI Feynman diagrams?

How does a charged field's coupling to the electromagnetic field translate to a worldline coupling?

Is the Lagrangian density of electromagnetism half-blind?

Lagrangian mechanics, infinitesimal movements expressed in coordinate basis

Questions about BRST formalism and BV formalism