Performing Legendre transformation when conjugate momentum is independent of time derivative of generalised co-ordinates
51122
Lagrangian of Schrodinger field
87800
Covariant derivative ambiguity
100158
How to find Origin for Angular Momentum?
150057
Approximating a three-times differentiable function by a linear combination of derivatives
43343
How to derive addition of velocities without the Lorentz transformation?
155492
Exercise on local and global symmetry for a given Lagrangian density
153903
Symmetry condition for continuous coordinate transformations
123911
Why is the derivative of a vector orthogonal to the vector itself?
53258
Why exactly does the time-reversal operator need to be anti-linear?
139530
Taking derivatives with respect to a matrix
9924
Derivative of conjugate multivariate function
100007
Express partial derivatives of second order (and the Laplacian) in polar coordinates
25164
Velocity-Dependent Potential and Helmholtz Identities
20025
Fourier transform of $\exp(-t^2)$ using contour integration.
125435
Practical application for linear transformations
158906
Instantaneous angular momentum of a disc
11205
Computing second partial derivative with polar coordinates