Escher. The language of an artist between art and mathematics

Tiziano De Carlo & Vladimiro Valerio
In looking at works of Escher is natural to ask whether there is a geometrical principle underlying its elaboration, which tend to confuse us and deceiving us through the clever use of illusory tricks. It seems that several worlds coexist in the same pictorial space, the orientation of which varies according to the relative position between the eye and flat. And is it possible to trace stable elements, officers of the points in its system...