Twist like behavior in non-twist patterns of triods
Abstract
We prove a sufficient condition for a \emph{pattern} on a \emph{triod} to have \emph{rotation number} coincide with an end-point of its \emph{forced rotation interval} . Then, we demonstrate the existence of peculiar \emph{patterns} on \emph{triods} that are neither \emph{triod twists} nor possess a \emph{block structure} over a \emph{triod twist pattern}, but their \emph{rotation numbers} are an end point of their respective \emph{forced rotation intervals}, mimicking the behavior of \emph{triod twist patterns}. These \emph{patterns}, absent in circle maps (see \cite{almBB}), highlight a key difference between the rotation theories for \emph{triods} (introduced in \cite{BMR}) and that of circle maps. We name these \emph{patterns}: ``\emph{strangely ordered}" and show that they are semi-conjugate to circle rotations via a piece-wise monotone map. We conclude by providing an algorithm to construct unimodal \emph{strangely ordered patterns} with arbitrary \emph{rotation pairs}.
Keywords
Cite
@article{arxiv.2412.18648,
title = {Twist like behavior in non-twist patterns of triods},
author = {Sourav Bhattacharya and Ashish Yadav},
journal= {arXiv preprint arXiv:2412.18648},
year = {2024}
}
Comments
21 pages, 7 figures