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silvascientist
  • Member for 10 years, 3 months
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50 votes

Mathematicians ahead of their time?

38 votes

Does having a finite number of generators, each having finite order, imply that the group is finite?

14 votes

Why do similar matrices represent the same linear transformation?

13 votes
Accepted

How to prove that the evaluation map is a ring homomorphism?

10 votes

What are the applications of functional analysis?

9 votes
Accepted

What is the proper usage of "identically zero"?

8 votes

What books should I get to self study beyond Calculus for someone about to start undergrad mathematics?

8 votes

What was the book that opened your mind to the beauty of mathematics?

8 votes

How to prove the Squeeze Theorem for sequences

6 votes
Accepted

Metric is continuous function

6 votes
Accepted

Is it true that $F$ is a field if and only if $F[X]$ is an Euclidean domain?

5 votes
Accepted

How does a Lie algebra transform under a diffeomorphism?

5 votes
Accepted

Trying to understand the philosophy of subspaces

5 votes

Is this the only way to prove that a map is smooth?

4 votes
Accepted

Why is $\frac{\sum_{i=1}x_iy_i}{\sum_{i=1}x_i^2}\ne \frac{\sum_{i=1}y_i}{\sum_{i=1}x_i}$?

4 votes

Can you have a gradient of time?

4 votes

Intuitively, why does $\int_{-\infty}^{\infty}\sin(x)dx$ diverge?

4 votes
Accepted

Why a group $G$ can form a 2-category?

4 votes

"Every open cover admits an open locally finite refinement" - can this refinement always be realized in terms of basis sets?

3 votes

If $X$ is a countable dense subset of the separable metric space $P$, then $P \setminus X$ is not separable

3 votes

Are all finite simple groups essentially permutation groups?

3 votes

Why linear independency of solutions of ordinary differential equations or functions is important?

3 votes
Accepted

$\mathbb{F}_2[X]/(S) \cong \mathbb{F}_4 $

3 votes

Does $\sin (5x)=5\sin(x)$? Why or why not?

3 votes

Is $d(x,y)=|x^3-y^3|$ metric on $\mathbb R$?

2 votes
Accepted

Is the series $1-\frac{1}{2}+\frac{1}{3!}-\frac{1}{4}+\frac{1}{5!}-...$ divergent, absolutely convergent or conditionally convergent?

2 votes

Is there any function which grows 'slower' than its derivative?

2 votes

A group with 3 subgroups. prove it is cyclic

2 votes

Multiplicative inverse of $0$

2 votes

If H is a subgroup of a group G and K is a normal subgroup of G the show that K is a normal subgroup of HK.