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UKperiodic
/pˌiəɹɪˈɒdɪk/
/ˌpɪɹiˈɑdɪk/
Examples
1. The charge density in the lattice is periodic.
2. y prime is periodic.
3. Periodic tilings can also have rotational symmetry.
4. The charge density in a crystal should be periodic.
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