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mick
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13 votes
3 answers
704 views

Supremum of $ a_n = a_{n-1}^3 - a_{n-2} $

10 votes
2 answers
983 views

Why is $\sup f_- (n) \inf f_+ (m) = \frac{5}{4} $?

8 votes
1 answer
481 views

$f(f(z)) = z , f(\exp(z)) = \exp(f(z)) $?

7 votes
1 answer
214 views

Density of extended Mersenne numbers?

4 votes
0 answers
119 views

$f(n) = \frac{n^2 + n + 4}{2}$, $g(f(n)) = f(g(n))$ such that $g(n)$ is an integer

4 votes
1 answer
340 views

About $a_n = \frac{a_{n-1}(a_{n-1} + C)}{a_{n-2}}.$

3 votes
0 answers
183 views

Does data suggest $| \pi_2 (n) - 2\Pi \int_2^n \frac{dx}{\ln(x)^2} | < \ln(n+2)^2 \sqrt (n+2) $?

2 votes
0 answers
134 views

Primes of the form $\frac{n^2-n+4}{2}$ satisfy Hardy-Littlewood analogue?

1 vote
0 answers
159 views

Nonassociative algebras closed under $\sqrt{\ }$?

1 vote
0 answers
234 views

Asymptotics to Taylor expansions?

1 vote
1 answer
441 views

Formal group law and Koenigs function conjecture?

1 vote
0 answers
469 views

The mysterious numbers $ \frac{13}{20} $ and $20$?

1 vote
0 answers
40 views

About nilpotent Jordan algebras, matrix representations and formally real algebras

1 vote
0 answers
119 views

$\sin(\frac{\pi}{p}) $ not expressible by positive radicals and $\sin(\frac{\pi}{q_i})$?

0 votes
0 answers
159 views

When does this commutative non-associative algebra have nilpotent elements?

0 votes
1 answer
223 views

Prime gap conjecture $ \pi_{2a}(n+(6a+4)^3)+(6a+4)^3 > \pi_{4a}(n)$ counterexamples?

0 votes
0 answers
145 views

Do we have tetration uniqueness by $ A = \inf \sum_n a_n^2 $?

-1 votes
1 answer
211 views

Can we classify all commutative unital algebras over the reals that are closed under $\sqrt{}$?