José Pedro Gaivão

Assistant Professor

Department of Mathematics
ISEG, Universidade de Lisboa
Rua do Quelhas, 6
1200-781 Lisboa
Portugal

Email: jpgaivao at iseg.ulisboa.pt
Phone: (+351) 213 925 874 (Ext. 3874)
Office: 511, Quelhas 6

Member of CEMAPRE and of the Lisbon Dynamical Systems Group - LxDS.

Research interests:

Dynamical Systems, Hamiltonian dynamics, piecewise contractions, billiards and exponentially small phenomena.

Exponentially small splitting of separatrices in the standard map.

Separatrix splitting

Basins of attraction of the dissipative outer billiard on the regular heptagon.

Outer billiard

Hyperbolic attractor of the dissipative billiard on the regular pentagon.

Pentagon billiard

Education:

Licenciatura in Matemática Aplicada à Tecnologia, Universidade do Porto (2005)
PhD in Mathematics (supervisor: Vassili Gelfreich), University of Warwick (2010)

Publications:

  1. Exponentially small splitting of invariant manifolds near a Hamiltonian-Hopf bifurcation
    PhD thesis, University of Warwick, 2010.
  2. Splitting of separatrices for the Hamiltonian-Hopf bifurcation with the Swift-Hohenberg equation as an example
    (with V. Gelfreich)
    Nonlinearity, 24, no.3, p. 677-698, 2011.
  3. Chaos in the square billiard with a modified reflection law
    (with G. Del Magno, J. L. Dias, P. Duarte and D. Pinheiro)
    Chaos, 22, 026106, 2012.
  4. Analytic invariants for the 1:-1 resonance.
    Annales de l'Institut Fourier, vol. 63, no.4, p. 1267-1426, 2013.
  5. SRB measures for polygonal billiards with contracting reflection laws
    (with G. Del Magno, J. L. Dias, P. Duarte and D. Pinheiro)
    Communications in Mathematical Physics, vol. 329, 2, p. 687-723, 2014.
  6. Ergodicity of polygonal slap maps
    (with G. Del Magno, J. L. Dias and P. Duarte)
    Nonlinearity, 27, no.8, p. 1969-1983, 2014.
  7. Dissipative outer billiards: a case study
    (with G. Del Magno and E. Gutkin)
    Dynamical Systems: An International Journal, vol. 30, no.1, p. 45-69, 2015.
  8. Hyperbolic polygonal billiards with finitely many ergodic SRB measures
    (with G. Del Magno, J. L. Dias, P. Duarte)
    Ergodic Theory and Dynamical Systems, 1-24, doi:10.1017/etds.2016.119, 2017.
  9. Hyperbolic billiards on polytopes with contracting reflection laws
    (with P. Duarte and M. Soufi)
    Discrete and Continuous Dynamical Systems - Series A, vol. 37, no. 6, p. 3079-3109, 2017.
  10. Asymptotic periodicity in outer billiards with contraction
    Ergodic Theory and Dynamical Systems, 1-16, doi:10.1017/etds.2018.36, 2018.
  11. $\lambda$-stability of periodic bililard orbits
    (with S. Troubetzkoy)
    Nonlinearity, 31, no.9, p. 4326, 2018.
  12. On the attractor of piecewise expanding maps of the interval
    (with G. Del Magno, J. L. Dias, P. Duarte)
    Stochastics and Dynamics (to appear), 2019.
  13. Ergodic properties of polygonal billiards with strongly contracting reflection laws
    (with G. Del Magno, J. L. Dias, P. Duarte)
    Preprint, 2015.
  14. Renormalization of Gevrey vector fields with a Brjuno type aithmetical condition
    (with J. L. Dias)
    Preprint, 2017.