# Tagged Questions

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### Checking if the Hessian is the derivative of the gradient

Suppose f: R^n --> R. I have a code that computes the gradient of f. I have another code that computes the Hessian of f times a vector. Now I want to check if they are correct. Specifically, I am ...
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### Determine best possible Lipschitz constant

I'm slightly confused by a homework problem here...I've been given the function: $f(u) = log(u)$ With the bounds: $2 \leq u \lt \infty$ Now I thought I understood what the Lipschitz Condition ...
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### Expected error due to the tablemakers' dilemma

[note: to me, this does not seem like a question for m.se, but on mathoverflow it has been retroactively closed, with very little indication of why or what might be corrected... and waiting for ...
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### Kummer U function: U(a,a+1/2,z)

Is there any way to simplify $U(a,a+1/2,z)$ or relate it to any other common special functions such as the incomplete beta function or the incomplete gamma function? Here, $U(a,b,z)$ is Kummer's U ...
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### SOR and Gauss-Seidel Method - Confusion

Can anyone explain to me the SOR Method for finding the root(s) of a function? Its supposedly very similar to the Gauss-Seidel method. The Gauss-Seidel method, from my understanding, is similar to ...