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invertible
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| invertible [2015/02/24 10:20] – created rupert | invertible [2016/02/24 16:13] (current) – rupert | ||
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| - | An $n\times n$ matrix $A$ is **invertible** if there exists an $n\times n$ matrix $A'$ so that | + | An $n\times n$ matrix $A$ is **invertible** if there exists an $n\times n$ matrix $C$ so that |
| - | \[ AA'=I_n=A'A.\] | + | \[ AC=I_n=C A.\] |
| + | The matrix $C$ is called an **inverse** of $A$. | ||
invertible.1424773210.txt.gz · Last modified: by rupert