Fractal 'celestial body' based on a torus and a 'recursive' -two iterations-' tridimensional intertwining inside a sphere ['Corps céleste' fractal basé sur un tore et un entrelacs tridimensionnel 'récursif' -deux itérations- à l'intérieur d'une sphère].
= 
= PA[PX[PX[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PZ[x,y,z]]],PY[PX[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PZ[x,y,z]]],PZ[PX[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PY[x,y,z]],PZ[PX[x,y,z],PZ[x,y,z]]],]
PA[x,y,z] ==
PX[x,y,z] = 
PY[x,y,z] = 
PZ[x,y,z] = 
