Mathematics
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Mark
  • Member for 9 years, 7 months
  • Last seen more than a week ago
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Top posts
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All Questions Answers
Score Newest
answer
7
Is a surjection from the natural numbers enough to show that a set is countable?
Mar 2, 2017
answer
6
Discriminant of the depressed cubic
Feb 13, 2017
answer
5
Given real angles $\phi_1,\ldots,\phi_N$, there exist infinitely many integers $n$ such that $\cos(n\phi_k) > 0$ for all $k$.
Sep 9, 2018
answer
5
Show that the field of fractions of $\mathbb{Z}[[x]]$ is properly contained in $\Bbb Q((x))$
Aug 29, 2018
answer
5
Degree of $\mathbb{Q}(\xi_{p^{2}})$ over $\mathbb{Q}$.
Mar 11, 2017
answer
4
unique factorization in polynomial modulo $p^k$
Aug 29, 2018
answer
3
Why can $2^3$ be defined but $0^0$ cannot
Feb 11, 2017
answer
3
Well defined function meaning
Feb 12, 2017
answer
3
How to prove Euler's formula: $e^{i\varphi}=\cos(\varphi) +i\sin(\varphi)$?
Feb 13, 2017
answer
3
Advice on mathematical thinking and problem-solving
Feb 13, 2017
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9
Examples of algorithms requiring deep mathematics to prove correctness
5
When does a modular form satisfy a differential equation with rational coefficients?

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