A poset is called a symmetric chaindecomposition if the poset can be expressed as a disjoint union of symmetric chains.
如果一个偏序集可以分解成不相交的对称链之并，则称此偏序集具有对称链分解。
2
Then it analyses the structure of industry environment and competitive advantage of Direct Mail magazine for laying theoretical basic of magazine industry value chaindecomposition and integration.
接着对我国免费直投杂志产业价值链的概况进行初步阐述，并对其产业环境结构和竞争优势进行分析。
3
Long length of carbon chain requires a higher temperature of decomposition.