👉 Cicone is a mathematical concept in the field of algebraic geometry that has applications in number theory and cryptography. It is named after the Italian mathematician Giuseppe Cicone, who introduced it in 1973. The cicone is a complex variety in projective space defined by the equation: \[ x^2 + y^2 - z^2 = 0 \] This equation represents the set of points on the surface of the sphere \(x^2 + y^2