<< - Page 1 2 3 4 5 6 7 8 9 10 11 - >>
Unicellular alga covered in silica. The photo of this diatom seen under an optical microsc...
The main gate at the entrance of the Department of Mathematics in via Saldini in Milan, sh...
A lace with dihedral symmetry of type D4.You can see an other one.
If we put any object between two incident mirrors at angle that divides 180° (36° in the...
A flower of Fagaria vesca, the edible strawberry frequently found in forests. A photograph...
The scheme of symmetry of this uncoloured drawing is of type D6. If we consider the colour...
The balcony of a house in via Caccianino, in Milan is decorated with rosettes with dihedra...
This detail of the dome of the tomb of the poet Hafez (Shiraz, Iran) provides an example o...
A photo of a Hedera helix leaf like this, taken from the right point of view, evokes a dih...
Pong Hau K'i, a simple game of strategy, originated in China and known, with some variants...
