Ruben Carpenter

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math.CO2026

Sets with Few Subset Sums

Ruben Carpenter, Colin Defant, Noah Kravitz

It is a classical fact that every $n$ -element set of positive reals has at least $(2 n + 1) + 1$ distinct subset sums, with equality exactly for homogeneous arithmetic progressi…

math.CO2026

On the number of permutation-twisted dot products

Ruben Carpenter, Colin Defant, Noah Kravitz

Let $K$ be a field of characteristic $0$ . For each choice of distinct $a_{1}, \dots, a_{n} \in K$ and distinct $b_{1}, \dots, b_{n} \in K$ , consider the sum $S=\…