1. Why is the norm of a vector noted by double pipes when it is just the magnitude which is notated by single pipes?(adsbygoogle = window.adsbygoogle || []).push({});

2. Does anyone know where I could find out why matrix multiplication is defined the way it is? I know how to do it, but I do not understand why it is that way.

Thank you.

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# Matrix Multiplication & Norms

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