DiscoverThe Secrets of MathematicsForbidden Crystal Symmetry: Mathematics and architecture - Roger Penrose
Forbidden Crystal Symmetry: Mathematics and architecture - Roger Penrose

Forbidden Crystal Symmetry: Mathematics and architecture - Roger Penrose

Update: 2014-12-041
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World-renowned mathematician Sir Roger Penrose, Oxford University, describes how crystalline symmetries are necessarily 2-fold, 3-fold, 4-fold, or 6-fold.
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Forbidden Crystal Symmetry: Mathematics and architecture - Roger Penrose

Forbidden Crystal Symmetry: Mathematics and architecture - Roger Penrose

Roger Penrose