The transformation in Case 1 of Theorem 18.

<p>The transformation in Case 1 of Theorem 18.</p

The transformation in the proof of Proposition 25.

<p>The transformation in the proof of Proposition 25.</p

The tree <i>T</i> in Propositions 23, 24 and 25, and Theorem 26.

<p>The tree <i>T</i> in Propositions 23, 24 and 25, and Theorem 26.</p

The transformation in the proof of Theorem 22.

<p>The transformation in the proof of Theorem 22.</p

The tree <i>T</i> in the proof of Proposition 15.

<p>The tree <i>T</i> in the proof of Proposition 15.</p

The transformation in the proof of Proposition 25.

<p>The transformation in the proof of Proposition 25.</p

The tree <i>T</i> in Proposition 17 and Theorem 18.

<p>The tree <i>T</i> in Proposition 17 and Theorem 18.</p

The tree <i>T</i> in Propositions 19, 20 and 21, and Theorem 22.

<p>The tree <i>T</i> in Propositions 19, 20 and 21, and Theorem 22.</p

The transformation in the proof of Proposition 21.

<p>The transformation in the proof of Proposition 21.</p

The transformation in the proof of Proposition 25.

<p>The transformation in the proof of Proposition 25.</p