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William
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49 votes
4 answers
9k views

What exactly is a matrix?

25 votes
6 answers
850 views

How "same" are two isomorphic groups?

19 votes
6 answers
3k views

What does using "Euclidean" before anything mean in Mathematics? [closed]

14 votes
3 answers
2k views

Why is $\sin : \mathbb{R} \to [-5,5] $ different from $\sin : \mathbb{R} \to \mathbb{R}$? [duplicate]

12 votes
11 answers
786 views

What is the logical flaw in this reasoning? Abusing $T \equiv T \vee F$.

11 votes
5 answers
828 views

Why do we eventually end up with $0$ in Euclidean Algorithm?

9 votes
2 answers
207 views

Why doesn't L'hopitals Rule work for $\lim\limits_{x \to \infty} \frac{x+ \sin x}{x+ 2 \sin x}$? [duplicate]

9 votes
7 answers
6k views

If the order in a set doesn’t matter, can we change order of, say, $\Bbb{N}$?

9 votes
2 answers
185 views

What are the functions that make composite functions called?

7 votes
1 answer
178 views

Finding number of permutations of order $k$ in $S_n$

6 votes
3 answers
726 views

How do I start this integral problem: $\int_0^1 \frac{\ln^3 u}{1-u} du = -\frac{\pi^4}{15} $? [closed]

6 votes
1 answer
119 views

Solution verification of $\lim\limits_{n \to \infty} \sum\limits_{r=1}^{n}\dfrac{1}{(n+r)^p}$?

5 votes
2 answers
739 views

Why are integer GCDs positive? [unit normalization of GCDs]

5 votes
2 answers
343 views

How do I solve this algebra problem

4 votes
2 answers
203 views

What is $\int\frac{x^4}{1+ e^x} dx$?

4 votes
2 answers
1k views

Does changing the order of sigma notation matter?

4 votes
5 answers
6k views

What does $f(x,y)$ mean?

4 votes
3 answers
176 views

Proving trigonometric problem from given trigonometric equations [duplicate]

4 votes
2 answers
120 views

What exactly does argument of a function mean?

4 votes
3 answers
235 views

Does $\dfrac{d}{dx} f(x) = 0 \Rightarrow f(x)$ is a constant function?

4 votes
2 answers
710 views

Why does a finitely oscillating sequence always has at least $2$ limit points?

4 votes
2 answers
1k views

Is polynomial in general the same as polynomial function?

4 votes
3 answers
965 views

How or why are implicit functions actually functions?

4 votes
2 answers
209 views

Can a group be thought of as some kind of "rule book" telling how symmetries interact with each other?

4 votes
2 answers
126 views

Is $xSx^{-1} \subseteq S$ equivalent to $xSx^{-1} =S$ in a group?

3 votes
2 answers
120 views

Does $y = f(x)$ and $y=g(x)$ imply $f(x)=g(x)$?

3 votes
2 answers
126 views

Intuition for Bolzano-Weierstrass Theorem

3 votes
1 answer
113 views

Proving a sequence is convergent using subsequences.

3 votes
1 answer
134 views

Powers of $i$ in Complex Numbers.

3 votes
3 answers
111 views

How do I find the value of $\sqrt{0+\sqrt{0+ \ ...}}$?

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