群结构常数是时空点的函数,永远是常数?
回答: 时空对称性:最具代表性的时空对称性是Lorentz变换和时空平移变换下,物理规律保持不变;内部对称性:一种作用在场的内部空间,且
由 marketreflections
于 2011-10-25 10:50:41
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