news.ycombinator.com
Unknown
2025-10-15 02:17:07
The Little Book of Linear Algebra
A concise, beginner-friendly introduction to the core ideas of linear algebra.
Formats
Chapter 1. Vectors
1.1 Scalars and Vectors
A scalar is a single numerical quantity, most often taken from the real numbers, denoted by $\mathbb{R}$ . Scalars are the fundamental building blocks of arithmetic: they can be added, subtracted, multiplied, and, except in the case of zero, divided. In linear algebra, scalars play the role of coefficients, scaling factors, and e