Jernej's user avatar
Jernej's user avatar
Jernej's user avatar
Jernej
  • Member for 14 years, 4 months
  • Last seen more than 2 years ago
  • Slovenia
13 votes
6 answers
10k views

Frobenius number for three numbers

15 votes
5 answers
9k views

Upper bounds for the sum of primes up to $n$

33 votes
10 answers
6k views

Is the empty graph a tree?

40 votes
1 answer
5k views

A generalisation of the equation $n = ab + ac + bc$

3 votes
3 answers
3k views

Laplacian spectrum for product graphs

6 votes
5 answers
2k views

The missing Euler Idoneal numbers

19 votes
3 answers
2k views

A generalization of the triangle counting problem for simple weighted graphs

18 votes
3 answers
1k views

Minimal graphs with a prescribed number of spanning trees

4 votes
2 answers
1k views

Upper bound for a+b+c in terms of ab+bc+ac

8 votes
4 answers
1k views

Prime numbers $p$ not of the form $ab + bc + ac$ $(0 < a < b < c )$ (and related questions)

7 votes
3 answers
1k views

Randomly contracting edges of a graph - expected number of vertices?

4 votes
4 answers
1k views

Determine if a graph has a large clique

11 votes
1 answer
962 views

Is every matching of the hypercube graph extensible to a Hamiltonian cycle

14 votes
1 answer
869 views

Tutte polynomials, graph complements and degree sequences

4 votes
2 answers
869 views

Asymptotics for the number of ways to sum primes such that the sum is <= n

3 votes
2 answers
858 views

Asymptotics for the number of partitions of $n$ into odd prime parts

6 votes
2 answers
838 views

Minimal graphs of prescribed girth and chromatic number

18 votes
1 answer
829 views

Showing that a certain matrix is not positive definite

7 votes
1 answer
803 views

(The) missing Moore graph(s) - uniqueness

5 votes
2 answers
767 views

Neat results from algebraic graph theory

6 votes
1 answer
648 views

Probability that a random edge coloring of the complete graph is proper

3 votes
1 answer
614 views

Counting matrices with different determinants

4 votes
1 answer
560 views

Generating non-isomorphic graphs by adding edges to a given graph

2 votes
1 answer
457 views

Number of partitions of $n$ with different product

8 votes
3 answers
443 views

An inequality related to the number of binary strings with no fixed substring

11 votes
1 answer
429 views

A variant of Cholesky decomposition involving binary matrices

4 votes
0 answers
410 views

Number of $k$-partitions of $n$ into odd prime parts

7 votes
1 answer
389 views

Induced subgraphs of small strongly regular graphs

1 vote
1 answer
365 views

Definition of convex cycles

8 votes
2 answers
335 views

Isomorphism problem on the class of induced subgraphs of a hypercube