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skyking
  • Member for 8 years, 8 months
  • Last seen more than a week ago
45 votes

How far is the list of known primes known to be complete?

15 votes

"Where" exactly are complex numbers used "in the real world"?

14 votes
Accepted

Difference between units and dimensions

14 votes

Prove the series $\sum_{n=1}^{\infty}\frac{1}{{5^n}^!}$ converges to an irrational number

12 votes

Problem with the compact version of the definition for "exactly one"

12 votes

Closed property of nonempty finite set

11 votes

it is correct to write 0,000 or just 0?

10 votes
Accepted

What is this equality: $\frac{\theta/(\theta+1)^{x+k}}{\theta^k}=(\frac1{\theta+1})^k(\frac{\theta}{\theta+1})^x$? How to work it out?

10 votes
Accepted

Showing that two definitions of $\limsup$ are equivalent

9 votes

Does the inverse of the matrix always rely on the determinant of a matrix?

9 votes

What is the main difference between a vector space and a field?

8 votes
Accepted

How many arrangements of MATHEMATICS are there in which each consonant is adjacent to a vowel?

8 votes

why is there no order in metric spaces?

8 votes
Accepted

Why is rotation about the y axis in $\mathbb{R^3}$ different from rotation about the x and y axis.

8 votes

Why do we want the Axiom of the Power Set?

8 votes

How does the axiom of regularity make sense?

8 votes
Accepted

How many right triangles can be made using the vertices of a regular $10$-gon?

8 votes
Accepted

How many ways are there for arranging letters of the word AMAZING?

8 votes

Probability of $0$

8 votes
Accepted

High school geometry proof help

7 votes

When is a proof or definition formal?

7 votes
Accepted

If the value of a polynomial is $0$ for $x=1$ , why do we say that $(x-1)$ is a factor

7 votes

Zero divided by zero must be equal to zero

6 votes
Accepted

A finite Hausdorff space is discrete

6 votes
Accepted

De Moivre Theorem. Find the exact values of the solutions of the equations.

6 votes

How many passwords can be formed from this maze?

6 votes
Accepted

if |f| is periodic then f is periodic

6 votes

Some questions Regarding Fourier Transform

6 votes

$A \in B$ vs. $A \subset B$ for proofs

6 votes

Isn't the Continuity Concept Redundant (up to definitions)?

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