New posts in Graph Theory

Prove planar graph has vertex of degree $\le 5$ without using Euler's formula

$n$ people at a party and friendship

Are there a finite number of trees with $k$ leaves and no vertices of degree $2$?

How to solve a "foraging" problem on a directed graph?

Ramsey number $R(3,7)=23$

An ant walks on a cube over the diagonals of little cubes. Can it visit all little faces exactly once?

Do we have "higher order graphs" (graphs with vertices defined as edges of other graphs)?

$7$ dwarfs $d_1, ... , d_7$ have $7$ jobs $j_1, ... , j_7$ to do every day

Doubt in a graph theory paper of Lovasz

What's wrong with this proof? Graph theory