1. is Lower Triangle Matrix ?
`[[1,0,0,0],[2,3,0,0],[4,5,6,0],[7,8,9,0]]`
Solution:
A square matrix, in which all elements above the main diagonal are zero, is called a lower triangle matrix.
`A` | = | | `1` | `0` | `0` | `0` | | | `2` | `3` | `0` | `0` | | | `4` | `5` | `6` | `0` | | | `7` | `8` | `9` | `0` | |
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Here, all elements above the main diagonal are zero, so it is a lower triangle matrix.
2. is Lower Triangle Matrix ?
`[[1,2,3],[2,3,4],[4,5,6]]`
Solution:
A square matrix, in which all elements above the main diagonal are zero, is called a lower triangle matrix.
`A` | = | | `1` | `2` | `3` | | | `2` | `3` | `4` | | | `4` | `5` | `6` | |
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Here, `a_(12)=2!=0`, so it is not a lower triangle matrix.
This material is intended as a summary. Use your textbook for detail explanation.
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