- Inversions and ProjectionsWhat?Inversion in a squareInversion in a splineInversion from an equilateral triangle to a regular 60-gonPappus ChainReflection in a CircleDifferent Multiples, Selected Mods, with InversionStereographic projectionStereographic Projection of an Array of CirclesStereographic Projections of Some Common FunctionsStereographic Projection of Coordinate Grid to SphereProjecting the Plane onto a SphereSexteto de Soddy