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New posts in combinatorial-designs
Question about members in sets
combinatorics
elementary-set-theory
combinatorial-designs
Getting everyone to meet everyone else
combinatorics
discrete-mathematics
graph-theory
combinatorial-designs
Partition a set into g groups, k different ways, such that no pair of elements is ever in the same group together more than M times
combinatorics
reference-request
combinatorial-designs
To find the minimum number of $3$-toppings pizza so that it meets the demand of my friend!
combinatorics
discrete-mathematics
recreational-mathematics
pigeonhole-principle
combinatorial-designs
For which $q$ there exists a Steiner system $S(2, q, q^2)$?
combinatorics
reference-request
combinatorial-designs
"Math Lotto" Tickets - finding the minimum winning set
combinatorics
pigeonhole-principle
coloring
combinatorial-designs
lotteries
How many meetings would it take for 12 people to meet in 4 groups of 3 until they met everyone?
combinatorics
combinatorial-designs
How many rounds would it take to get each pair on the same team at least once, not using all possible teams?
combinatorics
combinatorial-designs
how to construct a binary matrix with given row and column distribution
combinatorics
matrices
graph-theory
coding-theory
combinatorial-designs
How do you create projective plane out of a finite field?
finite-fields
projective-geometry
combinatorial-designs
Maximally unique beach volleyball games
combinatorics
graph-theory
optimization
combinatorial-designs
For which $n\in\Bbb N$ can we divide $\{1,2,3,...,3n\}$ into $n$ subsets each with $3$ elements such that in each subset $\{x,y,z\}$ we have $x+y=3z$?
combinatorics
graph-theory
contest-math
constructive-mathematics
combinatorial-designs
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