Definition:Matrix/Square Matrix/Order
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Definition
Let $\mathbf A$ be an $n \times n$ square matrix.
That is, let $\mathbf A$ have $n$ rows (and by definition $n$ columns).
Then the order of $\mathbf A$ is defined as being $n$.
Sources
- 1965: Seth Warner: Modern Algebra ... (previous) ... (next): Chapter $\text {V}$: Vector Spaces: $\S 29$. Matrices
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): order (of a matrix)