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12h
comment Is $e^x$ finite almost everywhere even though $\mathop {\lim }\limits_{x \to \infty } {e^x} = + \infty $?
I think that first "blah everywhere" should be "blah almost everywhere".
12h
comment Vibrating water container problem
This is a poorly designed problem. The water cannot jump up like that because below it there would be a vacuum. In real life the behaviour of water in a vertically oscillating container is surprisingly complicated.
14h
comment Maximization of sum of convex functions
If you say so. But the maximum can't be unique because $f(\alpha w)=f(w)$ for all $\alpha\ne0$.
18h
comment AX=B in Matlab solution
@Sridhar: Yes, see johndcook.com/blog/2010/01/19/dont-invert-that-matrix
20h
revised Is $e^{e^{2}}$ a relatively good approximation for $1000\phi$?
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20h
comment Maximization of sum of convex functions
Let $a=(1,0)$, $B=I_{2\times 2}$. Then $f(x,y)=x^2/(x^2+y^2)$ is concave in $(x,y)$?
1d
comment What is the highest number that can be got from 4383 by moving exactly 2 matches?
An LED-style 9 is supposed to have the bottom horizontal bar. What you have there looks more like a q.
1d
comment What is the value of $\lim_{x\to 0}x^x$?
No, $x\ln x\ne\ln x+1$.
1d
comment Are all interior points limit points in complex analysis?
The question in the title is different from the question in the post.
1d
comment What is the formal negation of the statement “There is much X in Y”.
There isn't much X in Y.
Jul
28
comment Volume of partially filled spherical cap?
Duplicate of deleted question math.stackexchange.com/q/620661
Jul
28
revised Volume of partially filled spherical cap?
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Jul
28
comment How can I use the Bullet-Physics's ray-cast normal to calculate angles for a object to lay on a surface?
Does this previous post answer your question?
Jul
27
comment How can I use the Bullet-Physics's ray-cast normal to calculate angles for a object to lay on a surface?
So... you want to rotate the pizza so that its $z$ axis lies along the surface normal, is that right?
Jul
27
awarded  Revival
Jul
26
revised Is there a good approximation for this?
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Jul
26
comment Law of Clavius explained
There are two possibilities: Either $P$, or $\lnot P$. But by the premise, if $\lnot P$, then $P$. So in either case, $P$.
Jul
26
comment Is “imposing” one function onto another ever used in mathematics?
If $g$ is constant this is known as a parallel curve.
Jul
24
comment How can we explain energy (or intensity) distribution mathematically?
en.wikipedia.org/wiki/Rendering_equation
Jul
23
comment Functions with real domain but complex range, do they have any use?
In general the result of the Fourier transform is such a function. In fact, elements of the Fourier basis (i.e. complex sinusoids) are examples, as are certain wavelets.