August 2008
Beginner to intermediate
568 pages
12h 1m
English
Content preview from Discrete Mathematics and Combinatorics
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Appendix C
Matrices
Informally, a matrix is a rectangular array of numbers such as
Every horizontal sequence of numbers in the matrix is known as a row, and every vertical sequence of the matrix is known as a column. For example, (2.5 7 7) is a row of the third matrix above and 
is a column of the first matrix. Let us note that the second matrix has two rows and three columns. It is an example of 2×3 matrix. An m × n matrix is a rectangular array of numbers with m rows and n columns. The entry in the ith row and the jth column is denoted by ...
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