Matrix Main Diagonal

(Redirected from Matrix Diagonal)
A Matrix Main Diagonal of an $n \times m$ matrix is a vector $v$ where $v_i = A_{i,i}$.
• In linear algebra, the main diagonal (sometimes leading diagonal or major diagonal or primary diagonal or principal diagonal) of a matrix $A$ is the collection of entries $A_{i,j}$ where $i$ is equal to $j$.