Canela Sánchez, JordiFagella Rabionet, NúriaGarijo Real, Antonio2017-12-052017-12-052016-09-210951-7715https://hdl.handle.net/2445/118515The goal of this paper is to investigate the family of Blasche products B_a , which is a rational family of perturbations of the doubling map. We focus on the tongue-like sets which appear in its parameter plane. We first study their basic topological properties and afterwards we investigate how bifurcations take place in a neighborhood of their tips. Finally we see how the fixed tongue extends beyond its natural domain of definition.32 p.application/pdfeng(c) IOP Publishing & London Mathematical Society , 2016Dinàmica topològicaSistemes dinàmics diferenciablesTopological dynamicsDifferentiable dynamical systemsTongues in degree 4 Blaschke productsinfo:eu-repo/semantics/article6700882017-12-05info:eu-repo/semantics/openAccess