New posts in Graph Theory

basis for null space of matrix in a certain field

3-regular graph and two-way Euler circuit

What is the smallest digraph whose reflexive, symmetric, transitive closures (in all combinations) are distinct?

Find minimum number of figures needed , so that no additional figure can be added?

Smallest graph that is vertex-transitive but neither edge-transitive nor edge-flip-invariant?

Let $A$ be a binary $n \times n$ matrix, such that $A^2=0$. What is the max num of $1$'s that $A$ could have?

GAP function to convert a subgroup lattice to a simple graph?

Proof strategy for 4-Colour-Theorem

Is there a triangulation of a closed surface with each vertex incident to $n\ge 7$ triangles?

If two graphs are isomorphic then will their determinants be equal?