Divergence and Curl (Vector Fields)

Gradient, Divergence, and Curl Explained: Essential Vector Calculus

Div, Grad, and Curl: Vector Calculus Building Blocks for PDEs [Divergence, Gradient, and Curl]

Introduction to Vectors and Their Operations

Operations on Vectors

The Vector Cross Product

Cross product introduction | Vectors and spaces | Linear Algebra | Khan Academy

Vector dot product and vector length | Vectors and spaces | Linear Algebra | Khan Academy