 Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2026/ii/paper-4/33a/a/iv/solution

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

For

s = 1/2

and

ℓ \geq 1

j = ℓ \pm 1/2

. Their degeneracies are

2 j + 1 = 2 ℓ + 2

and

2 ℓ

, summing to

4 ℓ + 2

as before.

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