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Symmetry operation : ウィキペディア英語版
Symmetry operation
In the context of molecular symmetry, a symmetry operation is a permutation of atoms such that the molecule or crystal is transformed into a state indistinguishable from the starting state.
Two basic facts follow from this definition, which emphasize its usefulness.
# Physical properties must be invariant with respect to symmetry operations.
# Symmetry operations can be collected together in groups which are isomorphous to permutation groups.
Wavefunctions need not be invariant, because the operation can multiply them by a phase or mix states within a degenerate representation, without affecting any physical property.
== Molecules ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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