1. is Upper Triangle Matrix ?
`[[1,2,3],[0,4,5],[0,0,6]]`Solution:A square matrix, in which all elements below the main diagonal are zero, is called a upper triangle matrix.
| `A` | = | | `1` | `2` | `3` | | | `0` | `4` | `5` | | | `0` | `0` | `6` | |
|
Here, all elements below the main diagonal are zero, so it is a upper triangle matrix.
2. is Upper Triangle Matrix ?
`[[1,2,3],[0,4,5],[1,0,6]]`Solution:A square matrix, in which all elements below the main diagonal are zero, is called a upper triangle matrix.
| `A` | = | | `1` | `2` | `3` | | | `0` | `4` | `5` | | | `1` | `0` | `6` | |
|
Here, `a_(31)=1!=0`, so it is not a upper triangle matrix.
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