重力场与电磁场--物质运动的有限几何场论（二）
Gravity Field and Electromagnetic Field-Finite Geometrical Field Theory of Matter Motion Part Two
摘要：
重力场论和电磁场论已建立并得到实验证实。爱因斯坦场方程的Schwarzschild度规和Kerr度规表明时间规范的空间微分是引力场。对于纯时间位移场，当其空间微分是可交换的时，可以建立保守场。当其空间微分为非对易时，可建立麦克斯韦电磁场方程组。当非对易场需要反协变时，本文导出了洛伦兹规范和库仑规范。本文证明了光是一种特殊物质，它的牛顿质量与库仑电荷之和为零。事实上，这一结论对真空中的电磁波也是成立的。对于保守场，研究表明，一旦给定质量密度和库仑电荷密度，宏观时空特征就完全确定了。这两种现象都是宏观物质在宇宙背景下的自相似特征。然而，对于宇宙年龄的老事件，空间曲率可能是不可忽视的。在这个意义上，最古老的引力场具有最大的空间曲率。这一点对于天文学来说是非常内在的。
英文摘要：
Gravity field theory and electromagnetic field theory are well established and confirmed by experiments. The Schwarzschild metric and Kerr Metric of Einstein field equation shows that the spatial differential of time gauge is the gravity field. For pure time displacement field, when its spatial differentials are commutative, conservative fields can be established. When its spatial differentials are non-commutative, Maxwell electromagnetic field equations can be established. When the contra-covariant is required for the non-commutative field, both Lorentz gauge and Coulomb gauge are derived in this research. The paper shows that the light is a special matter in that the addition of its Newtonian mass and its Coulomb electric charge is zero. In fact, this conclusion is true for the electromagnetic wave in vacuum. For the conservative field, the research shows that once the mass density and the Coulom charge dendity are given, the macro spacetime feature is completely determined. Both of them are intrisinc features of macro matter in cosimic background. However, for the cosmic ages old events, the spatial curvature may be cannot be ignored. On this sense, the oldest gravity field has the largest curvature of space. This point is very intrinsic for astronomy matters.
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