Case number 19

6 spheres with the + and - regions of the easiest spherical functions 42 different polyhedra from 1780 6 spheres with the + and - regions of Lamé products 6 spheres with the + and - regions of Lamé products
42 different polyhedra from 1780 42 different polyhedra from 1780 Fresnel wave surface for optic biaxial crystals Fresnel wave surface for optic biaxial crystals
Fresnel wave surface for optic biaxial crystals Fresnel wave surface for optic biaxial crystals Fresnel wave surface for optic biaxial crystals

The corresponding bottom case is: Case number U 19

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