Gorka's user avatar
Gorka's user avatar
Gorka's user avatar
Gorka
  • Member for 11 years, 9 months
  • Last seen this week
82 votes
17 answers
11k views

Examples of algorithms requiring deep mathematics to prove correctness

33 votes
2 answers
1k views

can another topology be given to $\mathbb R$ so it has the same continuous maps $\mathbb R\rightarrow \mathbb R$?

26 votes
1 answer
1k views

What is the status on this conjecture on arithmetic progressions of primes?

21 votes
4 answers
7k views

number of zeroes in 100 factorial

9 votes
1 answer
450 views

For an intersecting family of $m$ sets there are at least $2m$ sets that are contained in at least one of them

7 votes
1 answer
369 views

Does the percentage of groups of order at most $n$ of even order aproach $1$?

6 votes
2 answers
1k views

Combinatorial designs textbook recommendation

6 votes
2 answers
23k views

Maximum number of edges in a planar graph

5 votes
1 answer
169 views

Determining the number of hamiltonian paths of $K_n-C_n$

5 votes
2 answers
870 views

Stirling numbers of the second kind with maximum part size

5 votes
2 answers
670 views

Sum of digits of repeating end of reciprocal of prime over period is $\frac{9}{2}$

5 votes
1 answer
321 views

Checking if polynomial can be iterated and only take prime values

4 votes
2 answers
143 views

Covering all except one of the purple intersection points of $n$ red and $m$ blue lines efficiently

4 votes
2 answers
602 views

covering designs of the form $(v,k,2)$

3 votes
0 answers
215 views

Counting number of ways to place bags and marbles inside bags so all bags contain an odd number of marbles

3 votes
3 answers
1k views

Turan's theorem for connected graphs?

3 votes
1 answer
219 views

If there are two primes at an even distance $k$ is there another disjoint pair of primes also at distance $k$?

3 votes
5 answers
346 views

Given A set $U$ and a set $\mathcal O$ of subsets of $U$, how many subsets of $\mathcal O$ have union $U$?

2 votes
2 answers
185 views

Is there a known construction for heavy topologies of all sizes?

2 votes
0 answers
210 views

Expected length of a random path in a graph

2 votes
1 answer
176 views

minimum ratio between the shortest and longest distances between $m$ points in $\mathbb R^n$

1 vote
1 answer
69 views

Hall type theorem for saturations of subsets of bipartite graphs

1 vote
1 answer
345 views

Computing Hausdorff-Gromov distance between these objects

1 vote
1 answer
80 views

Resource on characterizations or properties of traceable graphs

1 vote
1 answer
191 views

How to calculate the maximum number of rainbows for arbitrary graphs?

1 vote
0 answers
123 views

labeling vertices in a graph to minimize distance between adjacent vertices

1 vote
1 answer
135 views

Constructive ideas behind "covering" a set with subsets of fixed size

1 vote
1 answer
184 views

How is this combinatorial structure called?

0 votes
1 answer
98 views

reference request for automata of this type [closed]

0 votes
1 answer
273 views

resources in surjunctive groups