3 papers
math.CO2026
Kneserized Anticoncentration and Reverse Absorption for Graham's Rearrangement Conjecture
Simone Costa, Stefano Della Fiore, Tao Feng +1
We establish a Kneser-based anticoncentration estimate for uniform subset sums in composite cyclic groups. The estimate contains a periodic loss and is weaker than its prime-modulu…
math.NT2026
Graham conjecture on small sets in abelian groups
Simone Costa, Stefano Della Fiore, Mattia Fontana +1
A famous conjecture of Graham asserts that every set can be ordered so that all partial sums are distinct. Although this conjecture was r…
math.CO2025
Biembeddings of Archdeacon type: their full automorphism group and their number
Simone Costa
Archdeacon, in his seminal paper , defined the concept of Heffter array in order to provide explicit constructions of -regular biembeddings of complete graphs…