Differences

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--- invertible [2016/02/24 16:03] – rupert
+++ invertible [2016/02/24 16:13] (current) – rupert
@@ Line 1: / Line 1: @@
-An $n\times n$ matrix $A$ is **invertible** if there exists an $n\times n$ matrix $A^{-1}$ so that
+An $n\times n$ matrix $A$ is **invertible** if there exists an $n\times n$ matrix $C$ so that
-\[ A\cdot A^{-1}=I_n=A^{-1}\cdot A.\]
+\[ AC=I_n=C A.\]
-The matrix $A^{-1}$ is called an **inverse** of $A$.
+The matrix $C$ is called an **inverse** of $A$.