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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 iden-tity matrix is an matrix whose main diagonal elements are 1, and all 1...
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- Spring '11