由物理体系的Poincare’群局域变换的Noether定理，推出了该物理体系的能动张量密度守恒定律，它就是Lorentz及Levi-Civita能动张量密度守恒定律，这个定律的存在更有利于研究物质场的起源问题。本文也指出了对研究物质场的起源问题尚待解决的困难。
From the Noether theorem of local Poincare’ transformation group for a physical system, the conservation laws of energy-momentum tensor density have been deduced in this paper; it is the Lorentz and Levi-Civita conservation laws of energy-momentum tensor density, which is more conducive to the study for the origin of matter field. This paper also points out the difficulty of the problem for the origin of matter field research unresolved.
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