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Im learning about gaussian integration right now but i cant really find anything about

the error approximation other than that it goes proportional to the 2nth derivative of the function at some point in the interval im trying to integration the function over.

But that doesnt really help me since i dont know at which point the derivative is to be evaluated.

Also i dont learn anything about functions who dont have that derivative at any point in the interval like sqrt(x) in the interval (0,1) for example.

So if anyone knows any good resources about the subject id def appreciate if someone could help tell me :)

Thanks

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# Gaussian Integration Error

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