Unformatted text preview: A , to denote a matrix, and lower case letters with subscripts, like a ij , to denote element of a matrix. Here a ij would be the element at i th row and j th column. So a 11 is an element at 1 st row and column. Sometime we use the abbreviation A = ( a ij ) for a matrix with elements a ij . 1.1. Special matrices. 0 denotes the zero matrix whose elements are all zeroes. So 2 × 2 and 3 × 3 zero matrices are • 0 0 0 0 ‚ and 0 0 0 0 0 0 0 0 0 Another special matrix is the identity matrix, denoted by I , a identity matrix is an matrix whose main diagonal elements are 1, and all 1...
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 Spring '11
 Dr.Han
 Linear Algebra, Howard Staunton

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