Matrices and Determinants

5. If all elements are real, the matrix is called a real matrix. 6. is called a square matrix of order n. And is called the principal diagonal. e.g. is a square matrix of order 2. 7. Notation : 8.2 Some Special Matrix. Def.8.1 If all the elements are zero, the matrix is called a zero matrix or null matrix, denoted by . ................
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