New posts in combinatorics

coloring a $4\times 4$ square with $4$ colors

combinatorics

Is $K_6$ a minor of $K_{2,2,2,2,2}$

combinatorics discrete-mathematics graph-theory

$ \sum_{x=1}^n {{n-1} \choose {x-1}} {N \choose x} = {{N+n-1}\choose n}$ [duplicate]

combinatorics combinations factorial

Probability of drawing a run of a specific color from an urn with two colors of balls

probability combinatorics balls-in-bins

Does there exist a set of exactly five positive integers such that the sum of any three distinct elements is prime?

combinatorics number-theory prime-numbers

What is the proof of the "thin set theorem"? A result in infinite Ramsey theory.

combinatorics ramsey-theory

"8 Dice arranged as a Cube" Face-Sum Equals 14 Problem

combinatorics reference-request puzzle recreational-mathematics dice

Can this product be written so that symmetry is manifest?

combinatorics binomial-coefficients factorial

Series of iterates of a power series

combinatorics complex-analysis

A man invited five friends.

probability combinatorics birthday

What is the winning strategy for this Game on the Power Set

combinatorics combinatorial-game-theory

Formula for the number of latin squares of size $n$?

combinatorics latin-square

Binomial coefficient and fibonacci numbers

combinatorics

Count of near matching sequences

combinatorics

When is a Sudoku like table solvable

combinatorics contest-math recreational-mathematics latin-square

Find a combinatorial proof to 10!=7!6!

combinatorics group-theory factorial symmetric-groups

Number of directional orders for $n$ points in $\mathbb{R}^d$?

sequences-and-series combinatorics geometry algebraic-topology order-theory

Soccer penalty shots

probability combinatorics

In how many ways can four prizes be distributed to three persons if every person receives at least one prize?

combinatorics

Generating function and integer sequence that arise from this function

combinatorics power-series generating-functions catalan-numbers