Introduction to Matrix Algebra
scalars by italicized, lower case letters (e.g., x), to denote vectors by bold, lower case letters (e.g., x), and to denote matrices with more than one row and one column by bold, upper case letters (e.g., X). A square matrix has as many rows as it has columns. Matrix A is square but matrix B is not square: A = 1 6 3 2 , B = 1 9 0 3 7 −2
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