↩ 🔵 🔵 🔵 ❪✺₁❫ Mathematical Classes ○ Matrix ○꠹ Augmented Matrix ○꠹ Coefficient Matrix ○꠹ Covariance Matrix ○꠹ Elementary Matrix ○꠹ Identity Matrix ○꠹ Inverse Matrix ○꠹ Rotation Matrix ○꠹ Square Matrix ○꠹ Transformation Matrix ○꠹ Triangular Matrix ○꠹ Zero Matrix ○꠹