Reduced basis method for non-symmetric eigenvalue problems: application to the multigroup neutron diffusion equationsYonah Conjungo Taumhas, Geneviève Dusson, Virginie Ehrlacher, Tony Lelièvre and François MadiotESAIM: M2AN, 58 5 (2024) 1959-1987DOI: https://doi.org/10.1051/m2an/2024055