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An expert is a man who has made all the mistakes, which can be made, in a very narrow field. (Niels Bohr)


Jan
26
reviewed Reject Find diff. function $f:\mathbb{R}^2 \to \mathbb{R}$ such that $f(x,y) \neq 0, f(0,0) = 0$ and $|R(0,x)|/|x|^n \to 0 \forall n$.
Jan
24
revised Help with integration of $\frac{f'(x)}{[f(x)]^n}$.
edited title
Jan
23
revised Find this limit: $ \lim_{n \to \infty}{(e^{\frac{1}{n}} - \frac{2}{n})^n}$
edited tags
Jan
23
awarded  Good Answer
Jan
22
revised convergence of $\prod_{n=1}^\infty (1-\frac{z}{n!})$
edited tags
Jan
18
awarded  Popular Question
Jan
17
reviewed Close Simplifying a hyperbolic trigonometric expression
Jan
17
reviewed Close let $x$ be in finite group $G$ and let order of $x$ is $p$. If $h^{-1}xh = x^{10}$ for a finite group show that $p=3$
Jan
17
reviewed Close Laplacian on sphere with differential forms
Jan
15
comment convergence of $\prod_{n=1}^\infty (1-\frac{z}{n!})$
@corciacandy What do you mean by 'order'? If you are talking about convergence order towards the convergence of the product is uniform or punctually you can use the M test Weiersstrass to achieve uniform convergence.
Jan
13
revised convergence of $\prod_{n=1}^\infty (1-\frac{z}{n!})$
added 534 characters in body
Jan
13
answered convergence of $\prod_{n=1}^\infty (1-\frac{z}{n!})$
Jan
13
revised Proving $proj_{proj_{\vec u} \vec v} \vec v=proj_{\vec u} \vec v$
deleted 2 characters in body
Jan
9
reviewed Reject How to take derivative with respect to a function
Jan
8
revised $ C^p_0(B,\mathbb{X})$ is a Banach space with the norm of $C^p\!\!$-topology?
Making the question a little more specific and clear.
Jan
6
revised $ C^p_0(B,\mathbb{X})$ is a Banach space with the norm of $C^p\!\!$-topology?
added 4 characters in body
Jan
4
reviewed Close Irreducibility of multivariate polynomials over algebraic numbers
Jan
4
reviewed Leave Open Prove this is a Martingale
Jan
4
comment if $x = \sqrt{x+1} + \sqrt{x+2} + \sqrt{x+3}$ then x =?
@user21820 yes. I did not express myself properly. I wanted to say that for each root a new root is added. Thanks for pointing.
Jan
3
revised Find this limit: $ \lim_{n \to \infty}{(e^{\frac{1}{n}} - \frac{2}{n})^n}$
added 151 characters in body