Definition:Matrix/Upper Triangular Elements
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Definition
Let $\mathbf A = \sqbrk a_{m n}$ be a matrix.
The elements $a_{i j}: i < j$ are called the upper triangular elements.
Also known as
Some sources refer to upper triangular entries.
Also see
Sources
- 2008: David Joyner: Adventures in Group Theory (2nd ed.) ... (previous) ... (next): Chapter $2$: 'And you do addition?': $\S 2.2$: Functions on vectors: $\S 2.2.3$: $m \times n$ matrices