Trajectory example
The Apollonius problem
The intersection of two planes
Sphere orthogonal to four given spheres
The study of geometric properties of the Dandelin spheres problem
Properties on inversion
Induction of the inversion point of the two circles on the third circle
Solution of the problem of Apollonius with imaginary elements
Recent research on geometry of conic
Equidistant
Correlation
Spatial correlation
Inversion and Quartics