Mathematics
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ZSMJ
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All Questions Answers
Score Newest
question
10
Find $\sum_{n=1}^{\infty}\tan^{-1}\frac{2}{n^2}$
Dec 27, 2018
question
8
Soft Question: Suggestions on mathematics resources for problem solving.
Dec 25, 2013
question
7
Find $\lim\limits_{x\to0^+}x(\lfloor \frac{1}{x}\rfloor+\lfloor \frac{2}{x}\rfloor+\cdots+\lfloor \frac{k}{x}\rfloor), \, k \in \mathbb N$.
Feb 28, 2019
question
5
Proving a lower bound on the limit superior of a sequence.
Dec 21, 2013
question
5
Reference request and prerequisites for understanding the Sphere Theorem and the Loop Theorem in 3-manifold theory.
Jul 9
answer
4
Is there a bijective map from $(0,1)$ to $\mathbb{R}$?
Aug 8, 2020
question
4
Prove that intersection of finite index subgroups has finite index.
Aug 4, 2014
answer
4
Sum of all the numbers in the grid.
Jul 3, 2019
question
4
Find $\int_{0}^{1} \int_{x}^{1}y^4e^{xy^2}dy dx$
Jan 30, 2019
question
4
Show $4x^2+6x+3$ is a unit in $\mathbb{Z}_8[x]$ (inverting unit + nilpotent)
May 14, 2019
Top Meta posts
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21
How to properly ask a "textbook recommendation" question?
10
Regarding giving credit to the source of inspiration of your answer.
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9
Being asked if I would like to be considered for a non-funded admission offer for PhD math
6
Importance of an applicant's area of interest in the grad school admission process
6
Grad schools in which countries, besides the US, allow you time to figure out your research topics?
6
Asking US grad schools for feedback on application after rejection

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