| (Oral Ensam 2011) Soient {A,B} dans {{\mathcal M}_n(\mathbb{C})} et {\Phi\,\colon M\in{\mathcal M}_n(\mathbb{C})\mapsto AMB}. Calculer {\text{tr}(\Phi)}. |
| (Oral Ensam 2011) Soient {A,B} dans {{\mathcal M}_n(\mathbb{C})} et {\Phi\,\colon M\in{\mathcal M}_n(\mathbb{C})\mapsto AMB}. Calculer {\text{tr}(\Phi)}. |