List questions from extremal-combinatorics | MathQA

What's the smallest set that covers $\mathbb{B}^n$ with at most one XOR operation?

Published on 05 Jan 2023 - 3:20

The least number of numbers the differences among which include Fibonacci numbers $F_2, F_3,\cdots, F_n$

Published on 12 Jan 2023 - 13:34

Moving points into the black cells of an infinite chessboard

Published on 29 Mar 2026 - 19:11

What's the "norm" on $S_k(n,d)$? (Behrend, $1946$)

Published on 21 Jan 2023 - 12:42

What computational shortcut finds the sum all possible products given any list of n random real numbers taken r at a time? Here's what I tried...

Published on 26 Mar 2026 - 23:10

Maximum number of elements of a subset

Published on 22 Jan 2023 - 16:57

How large can $X\subset \mathbb{F}_2^{10}$ be without solutions to $x_1+\cdots+x_n=0$ for $n\le4$?

Published on 23 Jan 2023 - 9:16

If $E$ denotes $n$ sets of size $k$, what is the minimum possible number of subsets of sets in $E$ of size $d$, $d<k$?

Published on 23 Jan 2023 - 17:17