Abstract
							In this paper, we prove the existence of smooth initial data for the 2D free boundary incompressible Euler equations (also known for some particular scenarios as the water wave problem) for which the smoothness of the interface breaks down in finite time into a splash singularity or a splat singularity.
																	 
					
					
						
							Authors 
														   Angel Castro
							     							   
							   École Normale Supérieure, Paris, France, Instituto de Ciencias Matemáticas, Madrid, Spain  and Universidad Autónoma de Madrid, Madrid, Spain							   							   
							   
														   Diego Córdoba
							     							   
							   Consejo Superior de Investigaciones Científicas, Madrid, Spain							   							   
							   
														   Charles Fefferman
							     							   
							   Princeton University, Princeton, NJ							   							   
							   
														   Francisco Gancedo
							     							   
							   Universidad de Sevilla, Sevilla, Spain							   							   
							   
														   Javier Gómez-Serrano
							     							   
							   Consejo Superior de Investigaciones Científicas, Madrid, Spain  and
 Princeton University, Princeton, NJ