The chemical trees of order <i>n</i> with Wiener polarity indices <i>n</i> − 3, <i>n</i> − 2 and <i>n</i> − 1, respectively.

<p>The chemical trees of order <i>n</i> with Wiener polarity indices <i>n</i> − 3, <i>n</i> − 2 and <i>n</i> − 1, respectively.</p

A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 17, 9<i>k</i> − 20,…,3<i>k</i> + 1, respectively.

<p>A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 17, 9<i>k</i> − 20,…,3<i>k</i> + 1, respectively.</p

A supporting example for the main result (Theorem 1) when <i>n</i> = 9.

<p>A supporting example for the main result (Theorem 1) when <i>n</i> = 9.</p

A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 16, 9<i>k</i> − 19,…,3<i>k</i> + 2, respectively.

<p>A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 16, 9<i>k</i> − 19,…,3<i>k</i> + 2, respectively.</p

The chemical trees <i>T</i> and <i>T</i>₁ in Lemma 2.

<p>(The edges which are represented by dashed lines may or may not occur in the tree).</p

A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 15, 9<i>k</i> − 18,…,3<i>k</i>, respectively.

<p>A series of chemical trees of order 3<i>k</i> with Wiener polarity indices 9<i>k</i> − 15, 9<i>k</i> − 18,…,3<i>k</i>, respectively.</p

The chemical trees <i>T</i>₁, <i>T</i>₂ and <i>T</i>₃ in the proof of Case 1 in Theorem 1.

<p>The chemical trees <i>T</i>₁, <i>T</i>₂ and <i>T</i>₃ in the proof of Case 1 in Theorem 1.</p

The transformation in the proof of Proposition 25.

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

The transformation in Case 1 of Theorem 18.

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

The transformation in the proof of Theorem 22.

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