New posts in Co.Combinatorics

Graph that minimizes the number of b/w colorings where white vertices have an odd number of black

The number of ways to merge a permutation with itself

Tree-width of graphs in which any two cycles touch

Combinatorial representation of function

Graphs on $\{0,1\}^n$ based on fixed Hamming distance

Integrality of a binomial sum

Function of $(x_1,x_2,x_3,x_4)$ that factors in two ways as $\phi_1 (x_1 ,x_2 )\phi_2(x_3 ,x_4 )=\psi_1 (x_1,x_3)\psi_2(x_2,x_4)$

Is matroid realizability computable?

Maximal in-degree in directed voting graph

Can American Math. Monthly be used to publish hard research?