Lemma 5 — $\mathrm{size}_C(v) = \mathrm{size}_T(v)$ at an apex, and $\mathrm{size}_C(v) = 1$ otherwise

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Lemma 5 — $\mathrm{size}_C(v) = \mathrm{size}_T(v)$ at an apex, and $\mathrm{size}_C(v) = 1$ otherwise · Prove2Me