Case number 18

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 Fresnel wave surface for optic biaxial crystals
Fresnel wave surface for optic uniaxial crystals Fresnel wave surface for optic uniaxial crystals Fresnel wave surface for optic biaxial crystals

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