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1h
revised As the limit of $n$ goes to infinity, prove that $x^n = 0$ if $\operatorname{abs}(x)<1$.
adapted to particular request
2h
answered As the limit of $n$ goes to infinity, prove that $x^n = 0$ if $\operatorname{abs}(x)<1$.
2h
comment As the limit of $n$ goes to infinity, prove that $x^n = 0$ if $\operatorname{abs}(x)<1$.
Simon S has pointed out a way to see that it converges, not why it converges to $0$.
3h
reviewed Reopen How to prove that in this context epimorphisms are 'surjective'
3h
reviewed Leave Closed General solution change of variables
3h
reviewed Leave Open Tangent plane of a convex set.
5h
reviewed Leave Open Showing $f(z) = e^ye^{ix}$ is defined on all $\Bbb C$
5h
reviewed Leave Open Let $A,B$ be compact subsets of $X$. Prove that $A \cap B$ is compact.
5h
reviewed Leave Open Proof By Induction - $n^2 = \sum_{i=1} ^{n} (2i-1)$ for all $n\geq 1$
5h
comment Proof By Induction - $n^2 = \sum_{i=1} ^{n} (2i-1)$ for all $n\geq 1$
But this question is better, and is asking for help completing a given attempted proof, which is not the case for the other question.
6h
reviewed Leave Open Finding MLE of $f(x;\theta) =1$ if $\theta-1/2<x< \theta+1/2$
6h
comment How to finish proof of $ {1 \over 2}+ \sum_{k=1}^n \cos(k\varphi ) = {\sin({n+1 \over 2}\varphi)\over 2 \sin {\varphi \over 2}}$
I vote to leave open because this question is much better than the proposed duplicate. The other was closed for missing context.
6h
reviewed Leave Open How to finish proof of $ {1 \over 2}+ \sum_{k=1}^n \cos(k\varphi ) = {\sin({n+1 \over 2}\varphi)\over 2 \sin {\varphi \over 2}}$
6h
answered Show that the antiderivative exist
6h
reviewed Leave Open Inclusions of $\ell^p$ and $L^p$ spaces
18h
reviewed Reopen Expectation of a linear combinations of iid standard normal, restricted to a halfspace
18h
reviewed Close Compute Using Binomial Theorem
18h
revised Inverse of multivariated polynomials over finite fields
rolled back to a previous revision
19h
reviewed Close How to prove a cube minus a cube is never a cube (in whole numbers)
19h
reviewed Leave Open Is $\left\{0,1,2\right\}^{\mathbb{Z}^2}=\left\{\left\{0,1,2\right\}^{\mathbb{Z}}\right\}^{\mathbb{Z}}$?