The members of our group have varied interests that encompass several areas in Analysis and Number Theory. Roughly speaking, it can be said that the unifying topic is Fourier analysis and the aims are the applications of its methods to some problems that lie mainly in analytic number theory, combinatorics and PDEs.
Among the generic goals towards which our efforts are directed, we outline: to contribute to the analytic theory of automorphic forms; to exploit the arithmetic interpretations of spectral theory; to extend the current knowledge about lattice point problems; to establish properties of special Fourier series; to explore the application of number theoretical techniques in some problems in quantum physics; to apply the theory of singular integrals to the equations in fluid mechanics; to state pointwise inequalities for nonlocal operators; to understand the development of singularities in some partial differential equations; to contribute to advances in higher order Fourier analysis, especially by deepening our understanding of the relation between Gowers uniformity norms and nilmanifolds; to improve the applications of harmonic analysis in arithmetic combinatorics and to develop new such applications.

Key words

Exponential sums, automorphic forms, ergodic theory, arithmetic combinatorics, singular integrals, fluid mechanics.

Research lines

Keeping in mind the MSC2010, a more concrete list of our research lines is:
  1. Sequences and sets
  2. Multiplicative number theory
  3. Harmonic analysis on Euclidean spaces
  4. Additive number theory
  5. Discontinuous groups and automorphic forms
  6. Fluid mechanics
  7. Ergodic theory
  8. Spectral theory


Research team (Equipo de investigación)
Working team (Equipo de trabajo)

Publication record since 2014

  1. [LINK] D. Alonso-Orán and A. Bethencourt~de León. On the well-posedness of stochastic Boussinesq equations with transport noise. J. Nonlinear Sci., 30(1):175-224, 2020.

  2. [LINK] D. Alonso-Orán, A. Bethencourt~de León, Darryl D. Holm, and So Takao. Modelling the climate and weather of a 2D Lagrangian-averaged Euler-Boussinesq equation with transport noise. J. Stat. Phys., 179(5-6):1267-1303, 2020.

  3. [LINK] O. Bakas, E. Latorre, D. C. Rincón M., and J. Wright. A class of multiparameter oscillatory singular integral operators: endpoint Hardy space bounds. Rev. Mat. Iberoam., 36(2):611-639, 2020.

  4. [LINK] Pierre-Yves Bienvenu, D. González-Sánchez, and Á. D. Martínez. A note on the bilinear Bogolyubov theorem: transverse and bilinear sets. Proc. Amer. Math. Soc., 148(1):23-31, 2020.

  5. [LINK] P. Candela, D. González-Sánchez, and B. Szegedy. On nilspace systems and their morphisms. Ergodic Theory Dynam. Systems, 40(11):3015-3029, 2020.

  6. [LINK] P. Candela, O. Serra, and Christoph Spiegel. A step beyond Freiman's theorem for set addition modulo a prime. J. Th\'{e}or. Nombres Bordeaux, 32(1):275-289, 2020.

  7. F. Chamizo. Adding from the W to the Z. Gac. R. Soc. Mat. Esp., 23(1):163-175, 2020.

  8. [LINK] F. Chamizo, A. Córdoba, and A. Ubis. Fourier series in {BMO} with number theoretical implications. Math. Ann., 376(1-2):457-473, 2020.

  9. [LINK] F. Chamizo, E. A. Gallardo-Guti\'{e}rrez, M. Monsalve-L\'{o}pez, and A. Ubis. Invariant subspaces for Bishop operators and beyond. Adv. Math., 375:107365, 25, 2020.

  10. [LINK] F. Chamizo and J. Granados. A short proof of a sharp Weyl law for the special orthogonal group. J. Spectr. Theory, 10(1):311-322, 2020.

  11. [LINK] F. Chamizo and R. J. Miatello. Sums of squares in real quadratic fields and Hilbert modular groups. Bull. Lond. Math. Soc., 52(1):244-259, 2020.

  12. [LINK] F. Chamizo and C. Pastor. Lattice points in bodies of revolution {II}. Math. Nachr., 293(6):1074-1083, 2020.

  13. [LINK] A. Córdoba and J. Ocáriz. A note on generalized laplacians and minimal surfaces. Bulletin of the London Mathematical Society, 52(1):153-157, 2020.

  14. [LINK] Jean-M. Deshouillers and A. Ubis. Integral points on convex curves. Ramanujan J., 53(2):399-422, 2020.

  15. [LINK] Daniel Di Benedetto, M. Z. Garaev, Victor C. Garcia, D. Gonzalez-Sanchez, I. E. Shparlinski, and C. A. Trujillo. New estimates for exponential sums over multiplicative subgroups and intervals in prime fields. J. Number Theory, 215:261-274, 2020.

  16. [LINK] D. Alonso-Orán and A. Bethencourt~de León. Stability, well-posedness and blow-up criterion for the incompressible slice model. Phys. D, 392:99-118, 2019.

  17. [LINK] D. Alonso-Orán, A. Bethencourt~de León, and So Takao. The Burgers' equation with stochastic transport: shock formation, local and global existence of smooth solutions. NoDEA Nonlinear Differential Equations Appl., 26(6):Paper No. 57, 33, 2019.

  18. [LINK] P. Candela and Anne De Roton. On sets with small sumset in the circle. Q. J. Math., 70(1):49-69, 2019.

  19. [LINK] P. Candela, D. González-Sánchez, and Anne de Roton. A Pl\"{u}nnecke-Ruzsa inequality in compact abelian groups. Rev. Mat. Iberoam., 35(7):2169-2186, 2019.

  20. P. Candela, D. González-Sánchez, and D. J. Grynkiewicz. A step towards the {$3k-4$} conjecture in {$Z/pZ$} and an application to {$m$}-sum-free sets. Acta Math. Univ. Comenian. (N.S.), 88(3):521-525, 2019.

  21. [LINK] F. Chamizo. Morphisms and period matrices. Linear Algebra Appl., 582:103-113, 2019.

  22. [LINK] F. Chamizo and C. Pastor. Lattice points in elliptic paraboloids. Publ. Mat., 63(1):343-360, 2019.

  23. A. Córdoba. Variations on the M\"{o}bius function. Gac. R. Soc. Mat. Esp., 22(3):551-562, 2019.

  24. [LINK] C. Pastor. On the regularity of fractional integrals of modular forms. Trans. Amer. Math. Soc., 372(2):829-857, 2019.

  25. [LINK] D. Alonso-Orán, A. Córdoba, and Á. D. Martínez. Continuity of weak solutions of the critical surface quasigeostrophic equation on $S^2$. Adv. Math., 328:264-299, 2018.

  26. [LINK] D. Alonso-Orán, A. Córdoba, and Á. D. Martínez. Global well-posedness of critical surface quasigeostrophic equation on the sphere. Adv. Math., 328:248-263, 2018.

  27. [LINK] D. Alonso-Orán, A. Córdoba, and Á. D. Martínez. Integral representation for fractional Laplace-Beltrami operators. Adv. Math., 328:436-445, 2018.

  28. P. Candela, J. Rué, and O. Serra. Memorial to Javier Cilleruelo: a problem list. Integers, 18:Paper No. A28, 9, 2018.

  29. [LINK] P. Candela and B. Szegedy. A continuous model for systems of complexity 2 on simple abelian groups. J. Anal. Math., 135(2):437-471, 2018.

  30. [LINK] A. Córdoba, D. Córdoba, and F. Gancedo. Uniqueness for sqg patch solutions. Trans. Amer. Math. Soc. Ser. B, 5:1-31, 2018.

  31. P. Candela. Notes on compact nilspaces. Discrete Anal., pages Paper No. 16, 57, 2017.

  32. P. Candela. Notes on nilspaces: algebraic aspects. Discrete Anal., pages Paper No. 15, 59, 2017.

  33. [LINK] F. Chamizo and A. González-Arroyo. Tachyonic instabilities in {$2+1$} dimensional Yang-Mills theory and its connection to number theory. J. Phys. A, 50(26):265401, 17, 2017.

  34. [LINK] F. Chamizo, I. Petrykiewicz, and S. Ruiz-Cabello. The Hölder exponent of some Fourier series. J. Fourier Anal. Appl., 23(4):758-777, 2017.

  35. [LINK] A. Córdoba and E. Latorre Crespo. Radial multipliers and restriction to surfaces of the Fourier transform in mixed-norm spaces. Math. Z., 286(3-4):1479-1493, 2017.

  36. A. Córdoba, E. Stein, T. Tao, L. Nirenberg, J. J. Kohn, S.-Y. A. Chang, C. R. Graham, D. Córdoba, B. Klartag, J. Fröhlich, L. Seco, and M. Weinstein. Ad honorem Charles Fefferman. Notices Amer. Math. Soc., 64(11):1254-1273, 2017.

  37. [LINK] S. Seuret and A. Ubis. Local $L^2$-regularity of Riemann's Fourier series. Ann. Inst. Fourier (Grenoble), 67(5):2237-2264, 2017.

  38. [LINK] A. Ubis. Effective equidistribution of translates of large submanifolds in semisimple homogeneous spaces. Int. Math. Res. Not. IMRN, (18):5629-5666, 2017.

  39. [LINK] A. Avila and P. Candela. Towers for commuting endomorphisms, and combinatorial applications. Ann. Inst. Fourier (Grenoble), 66(4):1529-1544, 2016.

  40. [LINK] P. Candela, B. Szegedy, and L. Vena. On linear configurations in subsets of compact abelian groups, and invariant measurable hypergraphs. Ann. Comb., 20(3):487-524, 2016.

  41. F. Chamizo. A theorem of Javier Cilleruelo. Gac. R. Soc. Mat. Esp., 19(3):607-614, 2016.

  42. A. Córdoba. J. Cilleruelo: the art of telling. Gac. R. Soc. Mat. Esp., 19(3):498-509, 2016.

  43. [LINK] A. Córdoba. Singular integrals, maximal functions and Fourier restriction to spheres: the disk multiplier revisited. Adv. Math., 290:208-235, 2016.

  44. [LINK] P. Candela and H. A. Helfgott. On the dimension of additive sets. Acta Arith., 167(1):91-100, 2015.

  45. F. Chamizo and C. Pastor. Rowland's sequence. Gac. R. Soc. Mat. Esp., 18(2):300, 2015.

  46. [LINK] F. Chamizo and D. Raboso. Lattice points in the 3-dimensional torus. J. Math. Anal. Appl., 429(2):733-743, 2015.

  47. [LINK] F. Chamizo and D. Raboso. On the Kuznetsov formula. J. Funct. Anal., 268(4):869-886, 2015.

  48. [LINK] F. Chamizo and D. Raboso. Van der Corput method and optical illusions. Indag. Math. (N.S.), 26(5):723-735, 2015.

  49. [LINK] A. Córdoba and Á. D. Martínez. A pointwise inequality for fractional Laplacians. Adv. Math., 280:79-85, 2015.

  50. [LINK] D. Raboso. When the modular world becomes non-holomorphic. In Trends in number theory, volume 649 of Contemp. Math., pages 221-244. Amer. Math. Soc., Providence, RI, 2015.

  51. [LINK] P. Sarnak and A. Ubis. The horocycle flow at prime times. J. Math. Pures Appl. (9), 103(2):575-618, 2015.

  52. [LINK] P. Candela and O. Sisask. Convergence results for systems of linear forms on cyclic groups and periodic nilsequences. SIAM J. Discrete Math., 28(2):786-810, 2014.

  53. [LINK] F. Chamizo and D. Raboso. Distributional properties of powers of matrices. Czechoslovak Math. J., 64(139)(3):801-817, 2014.

  54. [LINK] F. Chamizo and A. Ubis. Multifractal behavior of polynomial Fourier series. Adv. Math., 250:1-34, 2014.

  55. [LINK] A. Córdoba and K. M. Rogers. Weighted estimates for conic Fourier multipliers. Math. Z., 278(1-2):431-440, 2014.