Research & publications

Mathematics, in detail.

My work lies at the intersection of number theory, Diophantine approximation and dynamical systems.

Research interests

Number theoryContinued fractionsAdditive combinatoricsDynamical systems

I study both metrical and regular approximation problems, including continued fractions, approximation spectra and the geometry of number-theoretic sequences. I also explore how AI can help solve mathematical problems.

Preprints

3 papers

  1. P1

    Nine-distance theorem and growth of best-approximation denominators

    Nikita Shulga

    Preprint · 2026

  2. P2

    The Dirichlet spectrum with respect to L₁ norm is [1/2, 1]

    Nikita Shulga

    Preprint · 2026

  3. P3

    Dirichlet improvability in Lₚ-norms

    With Nikolay Moshchevitin

    Preprint · Revised June 2026

Journal papers

Published & accepted · 18 papers

  1. 18

    Averages of Gauss map iterations in arithmetic progressions

    With Mumtaz Hussain, Bixuan Li

    Acta Mathematica Hungarica 178, 392–424 (2026)

  2. 17

    Weighted approximation for limsup sets

    With G. Gonzalez Robert, M. Hussain, B. Ward

    Nonlinearity 39, issue 3 (2026)

  3. 16

    On a conjecture of Cusick on sums of Cantor sets

    Nikita Shulga

    Transactions of the American Mathematical Society 379, 4169–4190 (2026)

  4. 10

    Metrical properties of finite product of partial quotients in arithmetic progressions

    With Mumtaz Hussain

    Annali della Scuola Normale Superiore di Pisa, Classe di Scienze Series 5, 27(1), 337–376 (2026)

  5. 15

    Approximation by uniformly distributed sequences

    With Gerardo González Robert, Mumtaz Hussain, Benjamin Ward

    Bulletin of the London Mathematical Society 57(11), 3550–3566 (2025)

  6. 14

    Restricted slowly growing digits for infinite iterated function systems

    With Gerardo González Robert, Mumtaz Hussain, Hiroki Takahasi

    Journal of Mathematical Analysis and Applications 549(1), article 129478 (2025)

  7. 13

    Complex numbers with a prescribed order of approximation and Zaremba's conjecture

    With Gerardo González Robert, Mumtaz Hussain

    Journal of Number Theory 274, 1–25 (2025)

  8. 12

    Metrical properties of exponentially growing partial quotients

    With Mumtaz Hussain

    Forum Mathematicum 37(5), 1379–1399 (2025)

  9. 11

    Radical bound for Zaremba's conjecture

    Nikita Shulga

    Bulletin of the London Mathematical Society 56, 2615–2624 (2024)

  10. 09

    Hausdorff dimension for sets of continued fractions of formal Laurent series

    With M. Hussain

    Finite Fields and Their Applications 95, 102377 (2024)

  11. 08

    Hausdorff dimension for the set with exponentially growing partial quotients in their Lüroth expansion

    With Mumtaz Hussain, Zhenliang Zhang

    Discrete and Continuous Dynamical Systems 44(6), 1747–1767 (2024)

  12. 07

    Difference of irrationality measure functions

    With Viktoria Rudykh

    Monatshefte für Mathematik 204, 171–189 (2024)

  13. 06

    Hausdorff dimension analysis of sets with the product of consecutive vs single partial quotients in continued fractions

    With Mumtaz Hussain, Bixuan Li

    Discrete and Continuous Dynamical Systems 44(1), 154–181 (2024)

  14. 05

    A note on badly approximable systems of linear forms over a field of formal series

    With Mumtaz Hussain

    Research in Number Theory 9, article 31 (2023)

  15. 04

    Rational approximations to two irrational numbers

    Nikita Shulga

    Moscow Journal of Combinatorics and Number Theory 11(1), 1–10 (2022)

  16. 03

    On the derivative of iterations of the Minkowski question mark function at special points

    Nikita Shulga

    Functiones et Approximatio Commentarii Mathematici 66(2), 191–202 (2022)

  17. 02

    On Gauss and Kloosterman sums

    With M. Avdeeva, N. Gorbatuk

    Far Eastern Mathematical Journal 20(1), 9–14 (2020) · In Russian

  18. 01

    Diophantine properties of fixed points of Minkowski question mark function

    With Dmitry Gayfulin

    Acta Arithmetica 195(4), 367–382 (2020)

Publication list from 12 August 2026, with bibliographic details checked against available publisher records on 3 October 2026. Papers are grouped by journal issue year; numbering follows the original publication list.

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Contact

Get in touch.

nikita.shulga@sydney.edu.au