Could someone please explain to me in fairly basic terms what the L(adsbygoogle = window.adsbygoogle || []).push({}); _{2}-norm is and what it does please. More specifically let me know what the following equation does...

E(N) = 2*pi[tex]\int[/tex](u(N) - u_{exact})^{2}r dr

Where E is the error for a specific N. I haven't found any good resources for learning about this on the internet. Also if someone could recommend a good book that would be great.

Thanks in advance.

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# L2 - norm help

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