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math.NT2026
Additive decompositions of multiplicative subgroups via differential identities
Chi Hoi Yip, Semin Yoo
Sárközy conjectured that the nonzero quadratic residues modulo a sufficiently large prime have no nontrivial additive decomposition. Hanson and Petridis proved the conjecture for a…
math.NT2026
Multiplicative subgroups are not restricted sumsets
Chi Hoi Yip, Semin Yoo
We determine exactly which proper multiplicative subgroups of a prime field can be represented as a restricted sumset of the form $A\mathbin{\widehat{+}} A=\{a+a':a,a'\in A,\ a\ne…
math.NT2024
-Diophantine sets over finite fields
Chi Hoi Yip, Semin Yoo
Let , be an odd prime power, and be a polynomial. An -Diophantine set over a finite field is a set $A \subset…