English

Reconstruction of caterpillar tanglegrams

Combinatorics 2025-08-18 v2

Abstract

A tanglegram consists of two rooted binary trees with the same number of leaves and a perfect matching between the leaves of the trees. Given a size-nn tanglegram, i.e., a tanglegram for two trees with nn leaves, a multiset of induced size-(n1)(n-1) tanglegrams is obtained by deleting a pair of matched leaves in every possible way. Here, we analyze whether a size-nn tanglegram is uniquely encoded by this multiset of size-(n1)(n-1) tanglegrams. We answer this question affirmatively in the case that at least one of the two trees of the tanglegram is a caterpillar tree.

Keywords

Cite

@article{arxiv.2501.13670,
  title  = {Reconstruction of caterpillar tanglegrams},
  author = {Ann Clifton and Eva Czabarka and Kevin Liu and Sarah Loeb and Utku Okur and Laszlo Szekely and Kristina Wicke},
  journal= {arXiv preprint arXiv:2501.13670},
  year   = {2025}
}

Comments

23 pages, 8 figures