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Top Questions
28 votes

Topological "Freshman's Dream"

general-topology examples-counterexamples quotient-spaces asked Nov 10, 2021 at 6:19
math.stackexchange.com

15 votes

Are these square matrices always diagonalisable?

linear-algebra eigenvalues-eigenvectors diagonalization tridiagonal-matrices toeplitz-matrices asked Apr 23, 2019 at 22:43
math.stackexchange.com

14 votes

What happened to the reemitted photons during recombination?

cosmology spectroscopy spectra cosmic-microwave-background asked Feb 24 at 1:14
astronomy.stackexchange.com

13 votes

Is there a substitution that relates every Fermat curve to an elliptic curve?

ag.algebraic-geometry nt.number-theory elliptic-curves asked Dec 20, 2018 at 0:39
mathoverflow.net

13 votes

Solid Angle Trigonometry?

trigonometry spherical-trigonometry asked Jan 29, 2018 at 8:40
math.stackexchange.com

9 votes

Is there a substitution which transforms every Fermat curve into an elliptic curve?

number-theory algebraic-geometry elliptic-curves algebraic-curves substitution asked Dec 17, 2018 at 0:12
math.stackexchange.com

9 votes

Is there a natural group of subgroups of a group?

abstract-algebra group-theory asked Jan 5, 2019 at 0:18
math.stackexchange.com

8 votes

A continuous curve intersects its 90 degrees rotated copy?

general-topology geometry euclidean-geometry curves asked Feb 11, 2019 at 21:07
math.stackexchange.com

7 votes

How is observable matter distributed in the universe?

star observational-astronomy cosmology observable-universe matter asked Feb 28 at 0:50
astronomy.stackexchange.com

7 votes

Synthetic solution to this geometry problem?

geometry contest-math euclidean-geometry asked Dec 5, 2018 at 1:06
math.stackexchange.com

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Top Answers
92
Asserting that Atheism and Theism are both faith based positions
philosophy.stackexchange.com

35
How should I tell a professor the answer to something he doesn't know?
academia.stackexchange.com

21
Sigma notation for sum of $\ln(x)^2$ from $2$ to $20$ with non-integer steps
math.stackexchange.com

17
Intuition for the derivative of the exponential function
math.stackexchange.com

16
Unsolved Problems due to Lack of Computational Power
math.stackexchange.com

15
Are all notation equal by derivatives?
math.stackexchange.com

14
Why do early math courses focus on the cross sections of a cone and not on other 3D objects?
math.stackexchange.com

13
How to learn without looking at solutions? (real analysis)
math.stackexchange.com

13
How do you manage to study and have a balance in your life at the same time?
academia.stackexchange.com

12
Why is 11. .. h6 such a bad move?
chess.stackexchange.com

12
Number of solutions to the Diophantine equation $xy-6(x+y)= 0$ such that $x\leq y$
math.stackexchange.com

11
Learn university maths or train for high school competitions: which is better?
matheducators.stackexchange.com

10
Question about $\int e^{x^2} dx.$ Why can't it be integrated using standard methods?
math.stackexchange.com

10
Showing $f(t) = t^4 + 2t^2 + 9$ is reducible over $\Bbb Q$
math.stackexchange.com

10
Exact value of a trigonometric rational
math.stackexchange.com

10
Logic - How to say "Not only but also".
math.stackexchange.com

9
How to prove $\mathbb{Z}_{2}\times\mathbb{Z}_{16}$ is not isomorphic to$\mathbb{Z}_{4}\times\mathbb{Z}_{8}$?
math.stackexchange.com

8
Why is exchanging these knights the best move for white?
chess.stackexchange.com

8
Almost normal subgroups: Is there any notion which is weaker than normal subgroup?
math.stackexchange.com

8
Question about proving $\mathbb{Z}[i]$ is not UFD
math.stackexchange.com

7
A pattern in determinants of Fibonacci numbers?
math.stackexchange.com

7
Area using $\iint dxdy$
math.stackexchange.com

7
Why $(-2)^{2.5}$ isn't equal to $((-2)^{25})^{1/10}$?
math.stackexchange.com

7
New Post Notices rollout on Stack Overflow
meta.stackexchange.com

7
Proving that $\sum_{n=1}^\infty \frac{p_n}{n^2} $ converges or diverges
math.stackexchange.com

6
How to solve $\sin^2(x)+\sin2x+2\cos^2(x)=0$
math.stackexchange.com

6
Compute $\int \sin(x) \left( \frac{1}{\cos(x) + \sin(x)} + \frac{1}{\cos(x) - \sin(x)} \right)\,dx.$
math.stackexchange.com

6
Is $x+y -\pi$ an algebraic expression or not?
math.stackexchange.com

6
$x^2 + y^2+xy = 1$ , then find the minimum of $x^3 y + xy^3 +4$
math.stackexchange.com

6
Prime factorizations of consecutive numbers, can they both contains powers of greater than or equal to $1000$?
math.stackexchange.com

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