%0 Journal Article %T A new inequality about matrix products and a Berger-Wang formula %J Journal de l’École polytechnique — Mathématiques %D 2020 %P 185-200 %V 7 %I École polytechnique %U https://doi.org/10.5802/jep.114 %R 10.5802/jep.114 %G en %F JEP_2020__7__185_0