# Linear Algebra Refresher: Vectors, Matrices, Broadcasting, Einsum — The LLM Engineer's Mathematical Language

> Source: https://sukruyusufkaya.com/en/learn/llm-muhendisligi/lineer-cebir-refresher-vektor-matris-einsum
> Updated: 2026-05-13T13:00:22.653Z
> Category: LLM Mühendisliği
> Module: Module 1: The AI Engineer's Mathematical Arsenal
**TLDR:** Vector/matrix/tensor intuition, broadcasting rules, dot product, three perspectives on matrix multiplication, einsum notation, norm families, mathematical anatomy of Q@K^T multiplication in attention.