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Lagrangian-formalism
New post in Lagrangian-formalism
What symmetries would cause conservation of acceleration?
February 3rd, 2021
acceleration
conservation-laws
lagrangian-formalism
noethers-theorem
symmetry
Has anyone ever come up with a formulation of quantum mechanics in which the action is an operator?
August 1st, 2022
operators
lagrangian-formalism
quantum-mechanics
action
In what sense (if any) is Action a physical observable?
July 29th, 2021
observables
action
lagrangian-formalism
classical-mechanics
quantum-mechanics
Deriving Newton's Third Law from homogeneity of Space
August 1st, 2022
conservation-laws
newtonian-mechanics
forces
lagrangian-formalism
Can Noether's theorem be understood intuitively?
November 21st, 2020
symmetry
conservation-laws
lagrangian-formalism
noethers-theorem
Why can't we ascribe a (possibly velocity dependent) potential to a dissipative force?
August 1st, 2022
classical-mechanics
forces
lagrangian-formalism
potential
dissipation
Is there a Lagrangian formulation of statistical mechanics?
May 19th, 2020
classical-mechanics
statistical-mechanics
lagrangian-formalism
Is there a proof from the first principle that the Lagrangian L = T - V?
January 5th, 2022
classical-mechanics
lagrangian-formalism
In Path Integrals, lagrangian or hamiltonian are fundamental?
August 1st, 2022
lagrangian-formalism
hamiltonian-formalism
path-integral
Hamiltonian for relativistic free particle is zero
May 29th, 2020
lagrangian-formalism
gauge-theory
hamiltonian-formalism
noethers-theorem
constrained-dynamics
Deriving Lagrangian density for electromagnetic field
August 1st, 2022
field-theory
lagrangian-formalism
electromagnetism
What is the physical meaning of the action in Lagrangian mechanics?
December 31st, 2020
lagrangian-formalism
action
What are examples of Lagrangians that not of the form $T-U$?
April 14th, 2022
lagrangian-formalism
Form of the Classical EM Lagrangian
April 1st, 2022
electromagnetism
lagrangian-formalism
symmetry
field-theory
gauge-theory
Why are they called "cyclic" coordinates?
July 29th, 2020
soft-question
lagrangian-formalism
definition
Does a non-lagrangian field theory have a stress-energy tensor?
December 27th, 2020
quantum-field-theory
lagrangian-formalism
field-theory
conformal-field-theory
stress-energy-momentum-tensor
Is Feynman talking about the zeroth law of thermodynamics?
August 10th, 2022
thermodynamics
statistical-mechanics
lagrangian-formalism
temperature
hamiltonian-formalism
How do non-conservative forces affect Lagrange equations?
August 1st, 2022
classical-mechanics
lagrangian-formalism
variational-principle
dissipation
conservative-field
Are there examples in classical mechanics where D'Alembert's principle fails?
August 1st, 2022
lagrangian-formalism
classical-mechanics
newtonian-mechanics
constrained-dynamics
What is the difference between Newtonian and Lagrangian mechanics in a nutshell?
September 25th, 2020
classical-mechanics
newtonian-mechanics
lagrangian-formalism
Equivalence of canonical quantization and path integral quantization
April 27th, 2020
lagrangian-formalism
operators
path-integral
quantum-hall-effect
quantum-field-theory
How can the Feynman rules be read off the Lagrangian?
August 1st, 2022
quantum-field-theory
lagrangian-formalism
feynman-diagrams
interactions
propagator
Physical meaning of Legendre transformation
August 17th, 2020
classical-mechanics
hamiltonian-formalism
lagrangian-formalism
thermodynamics
How general is the Lagrangian quantization approach to field theory?
September 1st, 2020
lagrangian-formalism
quantum-field-theory
quantization
Derivation of Euler-Lagrange equations for Lagrangian with dependence on second order derivatives
August 1st, 2022
lagrangian-formalism
action
boundary-conditions
variational-principle
variational-calculus
The meaning of action
February 9th, 2020
lagrangian-formalism
action
Geodesic Equation from variation: Is the squared lagrangian equivalent?
August 1st, 2022
lagrangian-formalism
variational-principle
action
geodesics
differential-geometry
Why do people say that Hamilton's principle is all of classical mechanics? How to get Newton's third law?
August 1st, 2022
forces
lagrangian-formalism
momentum
conservation-laws
newtonian-mechanics
Derivation of the Polyakov Action
August 1st, 2022
string-theory
lagrangian-formalism
variational-principle
action
Derivation of Maxwell's equations from field tensor lagrangian
June 7th, 2020
lagrangian-formalism
variational-principle
maxwell-equations
electromagnetism
action
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