MIC in Bolzano
One of the ten signposts of the MIC project "Maths in the city".
This one is placed near the two bridges, one for pedestrians, one for bycicles, which are in front of the Museion, and it remarks how the impressione of "twisted" that we get by looking at the two bridges corresponds to a well.determined mathematical fact: the central line of the two bridges is niot a plane curve.
You can see another one of the ten signposts.
The image belongs to the sections...:
The maths signposts in the streets (Exhibitions with matematita)
Lines and curves in 3d-space (3D geometry)