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2d
reviewed Approve suggested edit on Show that if $f$ is continuous on $(0,1)$ and $\lim_{x \to 0}f(x) = + \infty$ then $f$ is not uniformly continuous
Nov
5
comment If $\sum\limits_{n=1}^\infty a_n$ diverges, then $\sum\limits_{n=1}^\infty\exp\left(-\sum\limits_{k=1}^n k a_k\right)$ converges?
Unfortunately, the sequence $(a_n)$ in my answer satisfies $\liminf_{n\to\infty} n^\epsilon a_n = 0$ for all $\epsilon > 0$.
Nov
5
comment If $\sum\limits_{n=1}^\infty a_n$ diverges, then $\sum\limits_{n=1}^\infty\exp\left(-\sum\limits_{k=1}^n k a_k\right)$ converges?
@Did: thanks, the typo is now fixed. The estimate of $S(J_N)$ is actually used in order to estimate $S(10^{J_N})$.
Nov
5
revised If $\sum\limits_{n=1}^\infty a_n$ diverges, then $\sum\limits_{n=1}^\infty\exp\left(-\sum\limits_{k=1}^n k a_k\right)$ converges?
deleted 22 characters in body
Nov
4
answered If $\sum\limits_{n=1}^\infty a_n$ diverges, then $\sum\limits_{n=1}^\infty\exp\left(-\sum\limits_{k=1}^n k a_k\right)$ converges?
Sep
30
awarded  Explainer
Sep
28
reviewed Approve suggested edit on Solve the following limits without L'Hospital's Rule
Sep
19
comment Condition for derivative sequence to converge?
Possible duplicate: math.stackexchange.com/questions/265930/…
Sep
19
reviewed Leave Open Condition for derivative sequence to converge?
Sep
19
reviewed Leave Open How to determine the orbits of points under the tripling map $f(x)=3x\bmod 1$?
Sep
19
reviewed Close Divergence and Convergence — Infinite Series
Sep
19
reviewed Leave Open Coupon Collector's problem with possibility of failure
Sep
17
answered What's the difference between stochastic and random?
Sep
8
reviewed Leave Open applicability of Poisson distribution
Sep
8
reviewed Leave Open Number of bases of $V= \mathbb{F}_p^2$
Sep
7
answered Proving a trigonometric inequality $(1-\sin a)x^2 -2x\cos a + 1+ \sin a \ge 0$
Sep
4
reviewed Close Darth Vader Rule: what is the reason for its name, and a formal proof?
Sep
2
comment A basic measure theory question
@user148951: most of the time, mathematicians are just lazy and don't bother about minimal hypotheses.
Sep
2
comment Definition of Measure of an Interval
Hint. Can you list all elements of $(a,b) \cap \frac{1}{N}\Bbb Z$?
Sep
2
reviewed Approve suggested edit on Prove that $\displaystyle \sum_1^3 x_i^4+\sum_1^3 x_i^6\le?$ when $\displaystyle\sum_1^3 x_i^2=3$