### Matrices

Matrices. CSE, POSTECH. Special Matrices. A square matrix has the same number of rows and columns. Some special forms of square matrices are Diagonal : M(i,j) = 0 for i ? j Tridiagonal : M(i,j) = 0 for |i-j| < 1 Lower triangular : M(i,j) = 0 for i < j

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