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Top Questions
94
votes
What is the equation for a 3D line?
geometry
3d
solid-geometry
asked May 28, 2013 at 3:34
math.stackexchange.com
87
votes
Terence Tao–type books in other fields?
real-analysis
abstract-algebra
complex-analysis
reference-request
soft-question
asked Jul 25, 2019 at 16:30
math.stackexchange.com
82
votes
How to treat differentials and infinitesimals?
calculus
asked Jan 9, 2014 at 0:27
physics.stackexchange.com
67
votes
Have there been any updates on Mochizuki's proposed proof of the abc conjecture?
ag.algebraic-geometry
nt.number-theory
arithmetic-geometry
abc-conjecture
asked Feb 25, 2016 at 4:53
mathoverflow.net
43
votes
"Classroom" math?
soft-question
problem-solving
asked Mar 3, 2017 at 15:03
math.stackexchange.com
42
votes
In the past did Martin Shkreli offer free medication for those who could not afford it?
medications
pharmaceutical
asked Jul 19, 2018 at 7:08
skeptics.stackexchange.com
40
votes
How can I answer this Putnam question more rigorously?
calculus
proof-writing
contest-math
asked Jul 28, 2016 at 17:57
math.stackexchange.com
37
votes
Why does Cersei need to repay the Iron Bank right now?
plot-explanation
game-of-thrones
asked Aug 10, 2017 at 15:23
movies.stackexchange.com
36
votes
Is diamond armor better than traditional armor?
science-based
medieval
medieval-europe
materials
armors
asked Apr 22, 2016 at 15:59
worldbuilding.stackexchange.com
35
votes
Could we reach the earth's core using today's nuclear arsenal?
science-based
reality-check
earth
geology
nuclear
asked Jul 4, 2016 at 16:26
worldbuilding.stackexchange.com
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Top Answers
63
Prove that $\sqrt 2 + \sqrt 3$ is irrational
math.stackexchange.com
33
What is the equation for a 3D line?
math.stackexchange.com
31
Why can't you flatten a sphere?
math.stackexchange.com
22
The pigeonhole principle(?)
math.stackexchange.com
21
How to introduce my perpetual motion invention to the scientific community?
worldbuilding.stackexchange.com
19
How can I calculate the number of perfect cubes among the first $4000$ positive integers?
math.stackexchange.com
15
Why is the Absolute value / modulus function used?
math.stackexchange.com
14
Why ReLU function is not differentiable at 0?
math.stackexchange.com
12
How to find the mod of this large number
math.stackexchange.com
12
How is linear algebra used in research?
math.stackexchange.com
11
Find coefficients of polynomial, knowing its roots are consecutive integers
math.stackexchange.com
11
What are the coordinates of red point?
math.stackexchange.com
11
What exactly is circular reasoning?
math.stackexchange.com
10
Is it feasible to have a nomadic space civilization?
worldbuilding.stackexchange.com
9
Can a subsequence repeat a term finitely many times?
math.stackexchange.com
8
Is moving faster than light speed a paradox?
worldbuilding.stackexchange.com
8
Why does the Cauchy-Schwarz inequality hold in any inner product space?
math.stackexchange.com
7
why $ 1 - \cos^2x = \sin^2x $?
math.stackexchange.com
7
Logarithmic equation proof
math.stackexchange.com
7
Question about the chain rule.
math.stackexchange.com
6
The probability of scoring a 2 just once when a die is thrown three times?
math.stackexchange.com
6
Non-trivial Polynomial Solution to $P(x)=(P'(x))^2, P(2)=0$?
math.stackexchange.com
6
Is $\sqrt{-(x^2)}$ discontinous on the reals?
math.stackexchange.com
5
Given any seven real numbers, prove that $0 \le \frac{x-y}{1+xy} \le \frac{1}{\sqrt3}$ holds for at least two?
math.stackexchange.com
5
How do I integrate $\int\dfrac{e^x - e^{-x}}{e^x + e^{-x}}\,dx$?
math.stackexchange.com
5
Finding Polynomial Equations for $1^4 + 2^4 + 3^4 + \ldots n^4$
math.stackexchange.com
5
My star will explode as a supernova. What can I do in order to ensure that my planet survives that?
worldbuilding.stackexchange.com
5
Convergence of $ \sum_{k=1}^{\infty} \frac {3^k}{5^k + 1}$
math.stackexchange.com
5
Give an example of a group G and elements a , b ∈ G such that a^{-1}(ba) ≠ b.
math.stackexchange.com
5
Adding $k^2$ to $1^2 + 2^2 + \cdots + (k - 1)^2$.
math.stackexchange.com
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