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arXiv · 2603.25513

Augmentation Lemma for Halin Conjecture

Jerzy Wojciechowski
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Abstract

The longstanding conjecture of Halin characterizing the existence of normal spanning trees in infinite graphs has been recently proved by Max Pitz [3]. A critical step in the proof involves the construction of dominated torsos, whose properties are essential to the overall proof. In this note, we provide a correction to the proof of a key property of this construction.

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Jerzy Wojciechowski. 2026-03-27. Augmentation Lemma for Halin Conjecture. https://arxiv.org/abs/2603.25513

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