Best Free Vector Based Programs

Krita Tutorial: How to Use Vector Tools and Shapes

The Basics - Introduction

Understanding Vector Spaces

2. Introduction to tensors.

Gradient, Divergence, and Curl Explained: Essential Vector Calculus

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

Calculus 3 Lecture 15.2: How to Find Divergence and Curl of Vector Fields