article: Molecular symmetry
links: Hans Bethe Eugene Wigner Delta (letter) Sigma Matrix multiplication Group (mathematics) Boric acid Infinity Cartesian coordinates Chirality (chemistry) X-ray crystallography Group theory Subscript and superscript Axis of rotation Symmetry Woodward–Hoffmann rules Atomic orbital Chemical reaction Cartesian coordinate system Parallel (geometry) Associativity Order (group theory) Pyramid (geometry) Pi (letter)