'Invertible matrices' diaporamas de présentation

Coefficient Path Algorithms

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5.2 Rank of a Matrix

5.2 Rank of a Matrix. Set-up. Recall block multiplication:. Theorem 1. The following conditions are equivalent for an n x n matrix A: 1. The rows of A are linearly independent in ? n . 2. The rows of A span ? n . 3. The columns of A are linearly independent in ? n .

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Example

1.4 Inverses; Rules of Matrix Arithmetic. For real numbers a and b ,we always have ab = ba , which is called the commutative law for multiplication . For matrices, however, AB and BA need not be equal. Equality can fail to hold for three reasons:

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