The logo

is inspired by the beautiful * three circles theorem*:

if three congruent circles pass through a common point, then their other three intersection points lie on a fourth circle of the same radius.

This theorem is also known as the

For an excellent survey on extensions and applications of Titeica's theorem to

- Euclidean geometry,

- descriptive geometry,

- elementary geometry in Minkowski planes,

- Clifford configurations,

- combinatorial geometry,

see the paper