Symmetry effects obtained by putting together some veneers. A creation of Tommaso Letterie...
The problem of the wrapping of circumferences shown in a stack of wood.
The problem of the wrapping of circumferences shown in a stack of wood.
A wenge-wooden sculpture of Tommaso Letteriello; from the exhibition “Colours and smells...
The drawing of the veins in this wooden sculpture of Tommaso Letteriello suggests the idea...
The drawing of the veins in this pinewooden sculpture of Tommaso Letteriello suggests the ...
The composition of two reflections with respect to incident lines is a rotation; the compo...
You can illustrate the focal properties of the ellipse with a billiard-table (with ellipti...
You can’t colour the vertices of this grid with 3 colours so that: 1) the vertex on the ...
other problems