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May
3
accepted Does $cN \leq \left|\sum_{n= 1}^{N}f(n)\right|$ imply $|f(n)| \geq c/2$ for many $n$?
May
3
comment Does $cN \leq \left|\sum_{n= 1}^{N}f(n)\right|$ imply $|f(n)| \geq c/2$ for many $n$?
$N$ is fixed and large.
May
3
revised Does $cN \leq \left|\sum_{n= 1}^{N}f(n)\right|$ imply $|f(n)| \geq c/2$ for many $n$?
clarified role of n
May
3
asked Does $cN \leq \left|\sum_{n= 1}^{N}f(n)\right|$ imply $|f(n)| \geq c/2$ for many $n$?
Dec
21
awarded  Popular Question
Oct
22
comment A contravariant functor taking colimits to limits is representable.
@ZhenLin: Not OP, but it should be that if $L$ is the left adjoint of $F$, then the representing object is $L(\{\ast\})$ where $\{\ast\}$ is the set with 1 element?
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
11
awarded  Yearling
Mar
8
awarded  Popular Question
Sep
2
asked All possible subsequences converging to same function $f$
Aug
23
revised Sequence of convex functions converges uniformly
Fixed typo
Aug
23
suggested approved edit on Sequence of convex functions converges uniformly
Aug
19
asked Showing $\frac{d}{dx}\left(\frac{f(x)}{1 + cf(x)}\right) \rightarrow 0$ as $c \rightarrow \infty$
Aug
17
accepted Example of $\{b_{n}\}$ such that $\sum_{n = 1}^{\infty}b_{n}b_{n + 1} < \infty$ but $\sum_{n = 1}^{\infty}(b_{n + 1} - b_{n})^{2} = \infty$
Aug
17
asked Example of $\{b_{n}\}$ such that $\sum_{n = 1}^{\infty}b_{n}b_{n + 1} < \infty$ but $\sum_{n = 1}^{\infty}(b_{n + 1} - b_{n})^{2} = \infty$
Aug
12
accepted Example of the equality of an inequality
Aug
12
comment Example of the equality of an inequality
Woah, clever. I like this solution.
Aug
12
accepted Question about Titchmarsh's proof of the Vitali Convergence Theorem
Aug
12
revised Example of the equality of an inequality
edited tags