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orlp
  • Member for 13 years, 3 months
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15 votes
1 answer
5k views

Is there a fast divisibility check for a fixed divisor?

13 votes
4 answers
913 views

Closed form for the area of a convex cyclic n-gon, given the set of edge lengths

11 votes
1 answer
456 views

Are there famous complex constants?

10 votes
5 answers
430 views

How much information can you transfer by choosing one number out of two?

9 votes
1 answer
604 views

Estimate true probabilities from weighted sampling without replacement

8 votes
3 answers
463 views

"Trivial" trigonometry problem

6 votes
2 answers
434 views

Average time for a tetris field to fill

6 votes
0 answers
125 views

Modular power tower mapping, is it injective?

6 votes
1 answer
573 views

Mean first hitting time of infinite Markov chain in the limit

5 votes
2 answers
2k views

Algorithm for computing Hadamard product of two rational generating functions

4 votes
0 answers
74 views

Rational integral conjecture of $(x^{2k} - \sin(\pi x))^2$

4 votes
2 answers
321 views

Testing whether the circumcenter of a cyclic quadrilateral lies inside it

4 votes
2 answers
457 views

Eigenvectors of harmonic series matrix

3 votes
2 answers
103 views

Closed form for solution of $f(n) = an + b\sum\limits_{k=0}^{n-1}f(k)$

3 votes
1 answer
379 views

Is my derivation of arithmetic mean of a function using definite integrals correct?

3 votes
0 answers
219 views

How can this trigonometrics equation be solved exactly, if possible?

3 votes
1 answer
1k views

Accurate computation of log error function difference

2 votes
1 answer
187 views

Why is $\sum_{k=1}^\infty (-1)^{k+1}\frac{ \text{csch}(\pi k)}{k} = \frac{1}{2}(\ln(64) - \pi)$?

2 votes
1 answer
114 views

Are any proofs of undecidability in ZFC also proofs of truth for properties of numbers?

2 votes
0 answers
216 views

Maintaining probability distribution under transform

2 votes
0 answers
45 views

Number of fundamentally different labelled finite fields

2 votes
1 answer
53 views

Faster test for maximum order elements mod p for highly composite p-1

2 votes
1 answer
60 views

Given n distinguishable d-dimensional points what is the largest number of different ways they can be linearly separated?

1 vote
1 answer
38 views

Average number of random integers needed to satisfy any modular subset sum?

1 vote
1 answer
56 views

Simpler proof that sorting a $n$-tuple of i.i.d. random variables gives a random permutation

1 vote
1 answer
38 views

Curious short pattern in least common multiple of binomial coefficients

1 vote
2 answers
206 views

Spinning a disk and painting one half - probability whole disk is painted after $n$ steps?

1 vote
0 answers
39 views

Sampling random sets of integers with bounded range

1 vote
2 answers
76 views

Is this notation correct?

1 vote
1 answer
139 views

How to continue this argument/proof?