Abstract:
Using Stepanov's method, we obtain an upper bound for the cardinality of the intersection of additive shifts of several multiplicative subgroups of a finite field. The resulting inequality is applied to a question dealing with the additive decomposability of subgroups.
Keywords:
multiplicative subgroup, finite field, Stepanov's method, sum of subgroups.
The work of the second and third authors (Secs. 1 and 3) was supported by the Russian Science Foundation under grant 14-11-00433. The work of the first author (Sec. 2) was supported by the Russian Foundation for Basic Research
under grant 14-01-00346.
Citation:
I. V. Vyugin, E. V. Solodkova, I. D. Shkredov, “Intersections of Shifts of Multiplicative Subgroups”, Mat. Zametki, 100:2 (2016), 185–195; Math. Notes, 100:2 (2016), 189–198