Nando Leijenhorst

LAAS-CNRS

7 Avenue de Colonel Roche

31 031 Toulouse

France

Office E46b

From November 2025, I am a Postdoc in the Polynomial Optimization (POP) group at LAAS-CNRS in Toulouse, France. In October 2025, I obtained my PhD in the Discrete Mathematics and Optimization group at Delft University of Technology in Delft, the Netherlands.

Currently I am mostly interested in applying semidefinite programming and polynomial optimization techniques in various areas, ranging from discrete geometry (e.g., the kissing number problem and energy minimization on the sphere) to quantum information theory (e.g. the NPA hierarchy).

selected publications

Preprint

Optimality and uniqueness of the D_4 root system

David de Laat, Nando Leijenhorst, and Willem H. H. de Muinck Keizer

Apr 2024

arXiv Bib

@unpublished{dLLdMK24,
  title = {Optimality and uniqueness of the D_4 root system},
  author = {{de Laat}, David and Leijenhorst, Nando and {de Muinck Keizer}, Willem H. H.},
  publisher = {arXiv},
  month = apr,
  year = {2024},
  keywords = {Mathematics - Metric Geometry}
}

Preprint

Optimality of spherical codes via exact semidefinite programming bounds

Henry Cohn, David de Laat, and Nando Leijenhorst

Mar 2024

arXiv Bib

@unpublished{CdLL24,
  author = {Cohn, Henry and {de Laat}, David and Leijenhorst, Nando},
  publisher = {arXiv},
  month = mar,
  year = {2024},
  keywords = {Mathematics - Metric Geometry}
}