Fields that lend themselves to variational principles?
44282
How do I show that there exists variational/action principle for a given classical system?
62692
Retrieving Maxwell's equations from the minimum action principle
17785
Variational Derivation of Schrodinger Equation
81550
Linking two theorems: on algebraic closure and on minimal splitting field
150687
Is there a concise term for a vector field where each component is a function of its own variable?
114910
In what subfields and how far can the naive limit $c\rightarrow\infty$ of special relativity be carried?
56266
Potential energy and the work energy theorem
137473
Isoperimetric inequality on the sphere via calculus of variations
105660
Invariance of action $\Rightarrow$ covariance of field equations?
67641
Why should field operators satisfy the classical equations of motion?
126142
Action principle, Lagrangian mechanics, Hamiltonian mechanics, and conservation laws when assuming Aristotelian mechanics $F=mv$
117986
Are there linear transformations from vector spaces over different fields?
13312
Is there something similar to Noether's theorem for discrete symmetries?
95759
Lower Semicontinuity Concepts
63807
Scalar Field Theories
158526
Finding a "Principle of Least Action" equivalent statement for Hamiltonian Mechanics
109774
How to obtain the functional derivative in variational inference?