Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2024/iii/paper-102/3/b/v/solution

The preceding Dynkin diagram identifies the root system with . The classification of finite-dimensional complex Simple Lie algebras by connected Dynkin diagrams therefore gives
This is the Isomorphism between so6 and sl4. Both algebras have dimension , consistently with the classification.

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