论文标题
所有相同保守的重力张量都是动作的度量变化
All identically conserved gravitational tensors are metric variations of an action
论文作者
论文摘要
我证明了一个旧的未解决的猜想，这是其明显足够的困难部分，即，所有相同保守的对称的两张量必然是不变动作的指标变化，从而使世界更加替代重力理论。证据是相当简单的，即使是物理学家的。
I prove an old unsolved conjecture, the hard part of its obvious sufficiency, namely that all identically conserved symmetric two-tensors are necessarily metric variations of invariant actions, thus sparing the world more alternative gravity theories. The proof is reasonably simple, if perhaps a physicist's.
