@article{d6c5b125b8c2478dab8377923b56b2c7,
title = "Moon in a Puddle and the Four-Vertex Theorem",
abstract = "We present a proof of the Moon in a puddle theorem, and use its key lemma to prove a generalization of the four-vertex theorem.",
author = "Anton Petrunin and Barrera, {Sergio Zamora} and C{\'a}liz, {Ana Cristina Ch{\'a}vez}",
note = "Funding Information: We wish to thank the anonymous referees for their thoughtful reading and insightful suggestions. This work was supported by the National Science Foundation under grant DMS-2005279; Simons Foundation under grant #584781. Publisher Copyright: {\textcopyright} 2022 The Mathematical Association of America.",
year = "2022",
doi = "10.1080/00029890.2022.2041355",
language = "English (US)",
volume = "129",
pages = "475--479",
journal = "American Mathematical Monthly",
issn = "0002-9890",
publisher = "Mathematical Association of America",
number = "5",
}