Lagrange with Higher Derivatives (Ostrogradsky instability)
105211
What is an intuitive way of understanding Ostrogradsky instability?
142892
Lagrangian Mechanics - Commutativity Rule $\frac{d}{dt}\delta q=\delta \frac{dq}{dt} $
125774
Derivative of $a^x$ from first principles
54329
stability and asymptotic stability: unstable but asymptotically convergent solution of nonlinear system
59165
Derivative of a linear transformation.
150057
Approximating a three-times differentiable function by a linear combination of derivatives
116083
Problems with NDSolve and stiffness
98358
A variational problem with a lagrangian , what is the lagrangian?
60897
Non-integer order derivative
125738
Names of higher-order derivatives
68813
Geodesic Equation from variation: Is the squared lagrangian equivalent?
73045
Transitioning between Lagrangian and Eulerian fluid variables
77253
Proof of Lagrange Identity
91056
How can I implement the method of Lagrange multipliers to find constrained extrema?
153727
Constant term in Lagrangian
153656
What Lagrangian counterterms might be needed in a $\phi^ 6$ theory in 3D?
43154
Modified Hamilton's Principle overconstraining a system by imposing too many boundary conditions