New posts in combinatorics

Neighbours in a circle with similar interests

upper bounding alternating binomial sums

combinatorics inequality summation binomial-coefficients

Number of functions $f : A \to A$ such that $f(f(x))=f(x)$

combinatorics functions elementary-set-theory

Compositions of $n$ with largest part at most $m$

combinatorics power-series generating-functions

Counting Binary Strings (No block decompositions)

combinatorics combinations bit-strings

Positivity of a certain sum of Stirling numbers

combinatorics harmonic-numbers stirling-numbers eulerian-numbers

Recursive formula for number of $n\times m\times p$ cubes of $0$'s and $1$'s with a special property.

Combinatorial Proof for $\sum_{k=0}^n \binom{2n}{2k}^2 = \frac{1}{2}\left( \binom{4n}{2n}+(-1)^n \binom{2n}{n} \right)$

combinatorics summation binomial-coefficients combinatorial-proofs

Number of Unique Sequences with Circular Shifts

sequences-and-series combinatorics algebra-precalculus combinations binary

Coupon Problem generalized, or Birthday problem backward.

probability combinatorics discrete-mathematics coupon-collector birthday

Combinatorics Pigeonhole problem

combinatorics discrete-mathematics pigeonhole-principle

Combinatorics - Painting the Unit Squares of a 3x3 Square

combinatorics algebra-precalculus

Words of Length $n$ over the Alphabet $\{1,2,3\}$ with Certain Restrictions

Philosophy of learning mathematics (combinatorics)

combinatorics self-learning learning

permutation search game

combinatorics algorithms combinatorial-game-theory

A question about "binary numbers in arbitrary bases"

How many hyperplanes does it take to separate $n$ points in $\mathbb{R}^m$?

combinatorics convex-analysis combinatorial-geometry

Theorem 1 chapter 8 of Fulton's Young Tableaux

combinatorics representation-theory young-tableaux

What's the name of this quantity?

combinatorics terminology permutations

Probability of collecting all 5 buying 7 chocolates

probability combinatorics