曲率就依这一度量而确定．爱因斯坦的引力理论依赖于二次型，而电磁理论只依赖于一次型

来源: marketreflections 于 2010-10-31 21:44:08 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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