Khan Academy

Divergence notation (K-A)

Curl warmup, fluid rotation in two dimensions (K-A)

Curl, fluid rotation in three dimensions (K-A)

Divergence-link (K-A)

Intuition for divergence formula (K-A)

Directional derivative (K-A)

Directional derivative, formal definition (K-A)

Directional derivatives and slope (K-A)

Gradient (K-A)

Gradient and contour maps (K-A)

Gradient and graphs (K-A)

Computing a Jacobian matrix (K-A)

Why the gradient is the direction of steepest ascent (K-A)

Jacobian prerequisite knowledge (K-A)

Local linearity for a multivariable function (K-A)

The Jacobian Determinant (K-A)

The Jacobian matrix (K-A)

Explicit Laplacian formula (K-A)

Harmonic Functions (K-A)

Laplacian computation example (K-A)

More formal treatment of multivariable chain rule (K-A)

Laplacian intuition (K-A)

Multivariable chain rule and directional derivatives (K-A)

Multivariable chain rule intuition (K-A)

Multivariable chain rule-video (K-A)