New posts in Graph Theory

What is the minimum wins needed to be in top 50 percent of teams in a round robin tournament?

Minimal Rook Difference Grids

Lower bound for $\sum_{v \in V(G)} d(v)\bar{d}(v)$

How can this planar map be coloured using $4$ colours?

Graceful graphs with Valence $k$

Spanning forests of bipartite graphs and distinct row/column sums of binary matrices

Getting everyone to meet everyone else

Playing Doublets with the Primes

Proving surjectivity of some map from a power set to a subset of integers.

Is it true that all paths between two vertices share a common point?