For basic questions about limits, derivatives, integrals, and applications, mainly of one-variable functions.

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1
vote
0answers
48 views
+50

Fast Hankel Transform

Can someone please explain what would be the expression for weights(Ho) in a Fast Hankel Transform.I found this in a paper and could not find any satisfactory answers .
2
votes
5answers
137 views
+200

Find the absolute maximum and minimum value of $f$

I have to find the absolute maximum and minimum value of $$f(x, y)=\sin x+\cos y$$ on the rectangle $[0, 2\pi] \times [0, 2\pi]$. I have done the following: $$\nabla f=(\cos x, -\sin y)$$ ...
3
votes
6answers
202 views
+200

The box has minimum surface area

Show that a rectangular prism (box) of given volume has minimum surface area if the box is a cube. Could you give me some hints what we are supposed to do?? $$$$ EDIT: Having found that for ...
6
votes
0answers
103 views
+50

prove or disprove an inequality on bounds of derivatives for radial functions

Suppose $f$ is a radial function, i.e., $f(x)=f(|x|)$, and $f \in C^\infty(\bar{B})$, where $\bar{B}$ is the closure of the unit ball in $\mathbb{R}^n$. Prove or disprove the following. Given any ...