Column matrix

Diagonal matrix

Scalar matrix

Identity or unit matrix

Upper triangular matrix

Lower triangular matrix

5. A matrix is termed as row matrix if m = 1

6. A matrix is termed as column matrix if n = 1

7. A matrix is termed as null or zero matrix if a

_{ij}= 0 for all i and j.

8. A matrix is termed as diagonal matrix if a

_{ij}= 0 for all ij where i is not equal to j.

9. A matrix is termed as scalar matrix if a

_{ij}= 0 for all ij where i is not equal to j and a

_{ij}= constant (k) for all i and j.

10. A matrix is termed as identity matrix or unit matrix if a

_{ij}= 0 for all ij where i is not equal to j and a

_{ij}= 1 for all i and j.

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