Research Interests

​My research works are in numerical optimization. I am interested in developing algorithms for continuous optimization non necessary convex problems. During my postdoc at KAUST I have a particular focus on randomized methods.


Selected Publications

  • On the use of the energy norm in trust-region and adaptive cubic regularization subproblems
    E. Bergou, Y. Diouane and S. Gratton
    COAP Journal, (2017)
  • Levenberg-Marquardt methods based on probabilistic gradient models and inexact subproblem solution, with applicatio...
    E. Bergou, S. Gratton and L. N. Vicente
    SIAM Journal on Uncertainties Quantification (SIAM/ASA JUQ), (2016)
  • Hybrid Levenberg–Marquardt and weak constraint ensemble Kalman smoother method
    J. Mandel, E. Bergou, S. Gurol and S. Gratton
    Nonlinear Processes in Geophysics Journal, (2016)
  • The exact condition number of the truncated singular value solution of a linear ill-posed problem
    E. Bergou, S. Gratton and J. I. Tshimanga
    SIAM Journal on Matrix Analysis and Applications (SIMAX), (2014)

Education Profile

​Ph.D, Numerical methods for least squares problems with application to data assimilation, INPT, Toulouse, France, December 2014.


Professional Profile

​2015-Present: Research scientist, INRA, Jouy-en-Josas, France

2018-2019: Postdoctoral fellow, KAUST, Thuwal, Saudi Arabia


KAUST Affiliations

  • ​​Visual Computing Center (VCC)

  • Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)