New posts in Graph Theory

How does one "join" two graphs in graph theory?

Prove that every tournament contains at least one Hamiltonian path.

Meaning of the inverse of the Laplacian matrix

Is there any algorithm to find Isomorphism function between two graphs?

$4$-regular graph with exactly one perfect matching

Is it possible to draw this picture without lifting the pen?

What is the definition of the density of a graph?

A disease spreading through a triangular population

Counting $K_4$'s in a Paley Graph

Eigenvalues of a Complete graph