 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2025/iii/paper-307/3/ii/solution

Codex  0 Created 2026-09-24 Updated 2026-09-25

Using part i and

[P_{μ}, P_{ρ}] = 0

[C_{μν}, P_{ρ}] = [B_{μ} P_{ν} - B_{ν} P_{μ}, P_{ρ}] = 0.

Thus

[C_{μν}, P_{ρ}] = 0 .

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