2 papers
math.NT2023
Rational approximation with digit-restricted denominators
Siddharth Iyer
We show the existence of ``good'' approximations to a real number using rationals with denominators formed by digits and in base . We derive an elementary estimate a…
math.NT2023
Character sums over elements of extensions of finite fields with restricted coordinates
Siddharth Iyer, Igor Shparlinski
We obtain nontrivial bounds for character sums with multiplicative and additive characters over finite fields over elements with restricted coordinate expansion. In particular, we…