协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。
The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.
本文讨论了对称张量场共形协变方程的真空解。
Vacuum solutions of conformally covariant equation for symmetric tensor field are discussed.
这种分解可以给出高阶张量协变导数的另一种定义。
This decomposition may give another definition of high order tensor's covariant derivative.
通过把高阶张量写成若干逆变和协变矢量的乘积，直接从变换入手，给出了定义高阶张量协变导数的另一种方法。
This paper discusses another way, which is rewritten as product of a few contravariant vectors and covariant vectors, to define higher order tensors covariant derivative through transformations.
本文运用协变方法和么正方法，分别给出了W-N理论和H-N理论量子宇宙波函数的单圈修正；并且讨论两种算法的差异性及矢量-张量引力理论的可行性。
We calculated the one - loop correction of W - N theory with unitary approach and H - N theory with covariant approach, then discussed the difference between the two approaches.
本文运用协变方法和么正方法，分别给出了W-N理论和H-N理论量子宇宙波函数的单圈修正；并且讨论两种算法的差异性及矢量-张量引力理论的可行性。
We calculated the one - loop correction of W - N theory with unitary approach and H - N theory with covariant approach, then discussed the difference between the two approaches.
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