A diagonal matrix is a square matrix whose only possibly nonzero entries lie on the main diagonal. This makes powers, determinants, and eigenvalues especially easy to compute.
⚠The matrix must be square. This checker supports 2x2 and 3x3 square matrices.
What Is a Diagonal Matrix?
A diagonal matrix stores all meaningful entries on the main diagonal. Because off-diagonal entries are zero, many matrix operations become simple and independent across coordinates.
Off-Diagonal Zero
Every entry away from the main diagonal must be zero.
Diagonal Flexible
Diagonal entries can be zero, positive, negative, or decimal.
Easy Powers
Diagonal matrix powers apply powers to diagonal entries.
Eigenvalues
The eigenvalues are the diagonal entries.
Example: [[2,0],[0,5]] is diagonal because the off-diagonal entries are both zero.
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