Mathematics
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Alex S
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562 Answers

Votes Activity Newest
61
Why is the number of integers between $2$ integers not their difference?
Nov 15 '17 at 17:29
41
Is basis change ever useful in practical linear algebra?
Apr 13 '16 at 1:35
37
What is a differential form?
Jul 21 '18 at 0:30
26
Different arrows in set theory: $\rightarrow$ and $\mapsto$
Apr 13 '16 at 3:29
25
Is a ring a set?
Mar 17 '16 at 4:00
24
Is there a sequence with an uncountable number of accumulation points?
Apr 4 '16 at 0:32
24
Is there an “intrinsic” difference between a plane and a cylinder?
Mar 24 '16 at 18:19
24
Function that decays faster than any polynomial, but not in the Schwartz space?
Jul 4 '15 at 23:38
23
Why is cardinality of set of even numbers = set of whole numbers?
Mar 29 '16 at 4:14
21
Space which is connected but not path-connected
Apr 10 '16 at 5:22
21
Shortest path between two points on a surface
Mar 22 '16 at 3:22
21
Is there something between summation and integration?
Jun 29 '15 at 19:58
20
Is a continuous function plus a discontinuous function discontinuous?
Apr 5 '16 at 4:03
19
Difference between limsup and sup
Apr 9 '16 at 1:15
16
What is the use of Calculus?
Oct 20 '15 at 1:56
16
Discussing the Integral of $\exp(-x^n)$
Jul 29 '16 at 17:44
16
e and its applications
Jun 26 '15 at 19:39
14
How many parametrisations are needed to cover a sphere?
Apr 3 '16 at 0:23
13
Are there more transcendental numbers or irrational numbers that are not transcendental?
Jul 8 '15 at 17:41
11
What happens if I repeatedly alternately normalize the rows and columns of a matrix?
Apr 14 '16 at 3:31
11
Why doesn't the trigonometric Equation $\sin (x) \sin (2x) \sin(3x)=1$ have real solutions
Oct 7 '15 at 14:45
11
Prove that the image of a a closed and bounded interval in $\mathbb{R}$ is a a closed and bounded interval in $\mathbb{R}$?
Jun 25 '15 at 4:08
11
Easy math proofs or visual examples to make high school students enthusiastic about math
Jun 24 '15 at 15:37
10
Series of binomial coefficients: $\sum\limits_{n=k}^{\infty}{\binom nk}x^n=\frac{x^k}{(1-x)^{k+1}}$
Sep 26 '16 at 1:53
10
Meaning of the term “topologically mixing”
Apr 9 '16 at 17:57
10
Is my current understanding of the fundamental of calculus correct?
Apr 2 '16 at 4:11
10
Elementary topology examples
Aug 12 '15 at 18:16
10
Are there fewer positive integers than all integers?
Jun 25 '15 at 18:38
9
Why does adding a term $5f'(t)$ to $5f''(t)+10f(t)=0$ cause damping?
Mar 26 '16 at 4:57
9
If $x \in [0,3]$ and $y \in [0,4]$, what is the probability of $x < y$?
Jul 8 '15 at 2:02
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