【摘要】 本文从时间反演对称性说明了晶体中布里渊区内能带Ｅ（ｋ）＝Ｅ（－ｋ）的反演对称性，并且证明当晶体具有中心反演对称时，布里渊区内能带是二重简并的更多还原

【Abstract】 It is shown that the inversion symmetry E(k)=E(-k) in the brillouin zone of a crystal is a consequence of the time reversal symmetry. It is also shown that the electron states are double degenerate in the brillouin zone when the crystal has the center inversion symmetry.更多还原