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JoshuaZ's user avatar
JoshuaZ's user avatar
JoshuaZ
  • Member for 11 years, 4 months
  • Last seen this week
29 votes
Accepted

Where is wrong with this fake proof that Gaussian integer is a field?

26 votes

How many fours are needed to represent numbers up to $N$?

11 votes
Accepted

Has Goldbach's Conjecture been proven?

10 votes
Accepted

Does "another" mean "another" in mathematics?

7 votes
Accepted

Are all numbers of the type $\frac{n!}{2}+1$ deficient?

6 votes

Is HOTT, a new attempt at foundation of mathematics, free from incompleteness theorem or is it still suffering?

6 votes
Accepted

Function that tells if number is prime, perfect square or other composite.

5 votes
Accepted

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

4 votes
Accepted

What is the percentage of known finite non-abelian groups to known finite abelian groups?

4 votes
Accepted

Is a pair of bases $(a,b)$ known such that Wieferich primes to bases $a$ and $b$ are impossible?

4 votes

Does a mathematical proof in $\mathbb{C}$ imply a proof in the $\mathbb{R}$?

4 votes
Accepted

Phi Function Summation and Divisors

4 votes
Accepted

Odd Perfect Number

4 votes
Accepted

Why is this inequality in Brent and Cohens paper on odd perfect numbers true?

3 votes

Convergence of the series $\sum n^{-\frac{x^n}{n}}$

3 votes
Accepted

Does $x^{11} - 23y =3$ have integer solutions?

3 votes

Disprove the Twin Prime Conjecture for Exotic Primes

2 votes

Can anyone tell me about this pattern between $\pi(x)$ and odd square numbers up to $625$?

2 votes
Accepted

How would you prove if $ab|(a+b)(a+b+1)$, then $(a,b) \leq \sqrt{a+b}$ for positive integers $a$ and $b$?

2 votes

Writing numbers with fewer symbols using expressions with powers

2 votes
Accepted

Conjecture on the gap between integers having the same number of co-primes

1 vote
Accepted

What are some counter-intuitive results that may occur in metric space but not in $\mathbb R$.

1 vote

Multiple epsilons in Epsilon N proof ,how to proceed?

1 vote

$b^{n}+1$ is prime only if $b\equiv0\pmod2$ and $n$ is a power of $2$

1 vote

In $x_\varepsilon (t)=\varepsilon t+O(\varepsilon ^2)$ does the rest depend on $t$?

1 vote
Accepted

Relation that is acyclic and complete but not transitive

0 votes

Are there too many 8-digit primes $p$ for Mersenne primes $M_p$?

0 votes

Why such an interest for the error term in the Prime Number Theorem

0 votes

Interpolation method that does never overshoot

0 votes

An algorithm that minimises the number of states for a conversion from a DFA to an NFA