New posts in Differentiation

Why is curl of current density $\nabla \times \vec{J}$ equal zero?

Conserved quantities and total derivatives?

Derivative with respect to a vector is a gradient?

Do derivatives of operators act on the operator itself or are they "added to the tail" of operators?

Why is the covariant derivative of the metric tensor zero?

Physical intuition for higher order derivatives

How do you do an integral involving the derivative of a delta function?

Derivative of the product of operators and Derivative of exponential

Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?

Laplacian of $1/r^2$ (context: electromagnetism and Poisson equation)