↩ 🔵 🔵 🔵 ❪✺❫ Linear Concepts ○ ❪✺₁❫ Algebraic Classes ○ ❪✺₁𝑖❫⁺ Classes of Matrices ○️ Linear Transformation ○꠹ Null Space ○꠹ System of Linear Equations ○꠹