Cusps and a converse to the Ambrosetti-Prodi theorem Article Sidebar Requires Subscription Download Article PDF Download Article Abstract PDF Submitted: Nov 18, 2015 Accepted: Nov 19, 2016 Published: Dec 27, 2017 DOI: https://doi.org/10.2422/2036-2145.201511_005 Issue 2018: VOL. XVIII, ISSUE 2 Section Article Main Article Content Marta Calanchi Carlos Tomei André Zaccur Abstract Article Details