TY - GEN AU - Ramírez Uclés, Rafael AU - Flores Martínez, Pablo PY - 2006 UR - http://hdl.handle.net/10481/64670 AB - Mathematics can be surprising and, lucky, this mathematical surprise is shown from time to time in the simplest details and turns out to be nearby for everybody. Generally it is not exclusive to mathematicians, and is accompanied by... LA - eng KW - Necker cube KW - Spatial vision TI - A challenge for your spatial vision: Are we able “to see” simultaneously more than three faces of the same dice? ER -